Here are quotes that I could find. It is my understanding that they never denied the teaching. The last they supposedly published on this was not a denial, but that they did not want people to start worshipping Pleiades/Alcyone. I have not run across this and do not know where it was supposedly published. Would hopefully some does?
WTR 05/15/1895 p1814 - "Our solar system of planets is also found to be revolving together around some other great center; and far beyond the farthest limits of our system, by the aid of the telescope, other suns and systems are discerned, all presumably revolving with ours around some common center. - the group Pleiades. And the reasonable suggestion has been made that that center may be the heaven of heavens, the highest heaven, the throne of God."
Jehovah's Witnesses believed Christ travelled there after his resurrection, and they identified Alcyone as the residence of Almighty God Jehovah himself.
WTR 12/01/1896 p2075 - "The most reasonable suggestion we know of is that offered in Millennial Dawn, Vol. III, page 327; namely, that heaven is located in or in connection with the heavenly group, Pleiades."
1908 TKIC p321
? So wonderful a coincidence convinced him that the date of the Great Pyramid?s building was thus indicated; for a Draconis is no less a symbol of sin and Satan than Pleiades is a symbol of God and the center of the universe.
1913 BATT p653 ?
Then, considering himself as an astronomer at that date, with his pointer fixed upon a Draconis, and considering the ascending passages as though they were a telescope, which they much resemble, he calculated what constellation or what notable star would have been before his telescope thus fixed at he particular date indicated by his pointer, and found that it must have been the Pleiades. The removal of one part of the mountain to the north and the other to the south is significant; the North is the direction of the group Pleiades, the celestial center of the universe, the supposed seat of divine empire.* (* See Vol. III., p. 321)
1915 "Furthermore, Science declares that there is a far mightier Center, around which these countless millions of suns revolve, accompanied by their planets and satellites. This great Center seems to be associated with the Pleiades, particularly with Alcyone, the central star of this renowned group. For this reason the suggestion has been made that the Pleiades may represent the Residence of Jehovah, the place from which He governs the Universe. This thought gives new force to the question which the Almighty asked the patriarch Job: "Canst thou bind the sweet influences of Pleiades, or loose the bands of Orion? Canst thou bring forth the constellations of the Zodiac in their season?"-- 'Job 38:31,32'. There seem to be fewer stars in the North than in any other part of the heavens. Thus the North seems to have been given a very prominent position, the other points of the compass giving it homage, as it were. This fact was observed by the ancients, as the Prophet Job declares--"He stretcheth out the North over the empty space, and hangeth the earth upon nothing." ('Job 26:7'.) Throughout the Scriptures the North seems to be closely associated with Jehovah's government of the earth. {ZWT
WTR
p5710 - "For this reason the suggestion has been made that the Pleiades may represent the residence of Jehovah, the place from which he governs the universe."
WT
; p334 - "Some one asked me the other day; Suppose you should be here in 1925 what would you do? I said, I believe I will be home in the Pleiades before then."
The Finished Mystery, 1926 ed., p. 230 -
"Alcyone, the central one of the renowned Pleiadic stars. . . . Alcyone, then, as far as science has been able to perceive, would seem to be 'the midnight throne' in which the whole system of gravitation has its central seat, and from which the Almighty governs his universe."
"The constellation of the seven stars forming the Pleiades . . . It has been suggested, and with much weight, that one of the stars of that group is the dwelling-place of Jehovah"
"The constellation of the Pleiades is a small one compared with others . . . But the greatness in size of other stars or planets is small when compared with the Pleiades in importance, because the Pleiades is the place of the eternal throne of God."
1927
CREA: p94 - "The face of the deep, of course, would be toward the Pleiades, which are claimed to be the habitation of Jehovah."
1928
RECO p14 - "The constellation of the seven stars forming the Pleiades appears to be the crowning center around which the known systems of the planets revolve even as our sun's planets obey the sun and travel in their respective orbits. It has been suggested, and with much weight, that one of the stars of that group is the dwelling-place of Jehovah and the place of the highest heavens;..
The constellation of the Pleiades is a small one compared with others which scientific instruments disclose to the wondering eyes of man. But the greatness in size of other stars or planets is small when compared with the Pleiades in importance, because the Pleiades is the place of the eternal throne of God."