Russel's connection is extremely tenuous, by extension so is that of Rutherford and the org. since, until this day.
There is no Record of Russell being a member of any Lodge, and their would be had he been a member.
Chas. Russell's Uncle, IIRC, was a member, but so what ? so were many in those days, more than now.
Russell no doubt thought it expedient to get the Masons to look favorably upon his movement, and maybe then buy some of his Publications, and so he used Masonic expressions, but we all do that in everyday speech, we speak of people being " on the Level" etc. etc.
There is simply no irrefutable proof of any direct connection. And we rightly expect quite a bit of proof, had there been a connection.