I ran down each side seperately, because I was unable to get the wire up and around the other side. Either way, with where my speakers are mounted having different length wires is unavoidable. I've been in the audio game for a long time, so I've seen (done?) all sorts of weird things, and I'm not too worried about extra length of the wire to the right speaker. I suppose I could coil up some extra from the left side to keep them equal, but I don't think it will be an issue.

Truth be told, I just wanted the tower speakers to look cool, I probably will never turn them on LOL!