After literally just finishing my install on my 4 towers on my regular OZ tower, I could see where it would be possible to run the wire up the port side, through the front cross bar, then cross back through the rear crossbar from the starboard side. I thought about it, but couldn't get my fish tape under (or over) the bimini sleeves on the front if the tower. Instead I ran a line up both sides of the tower. The port side only feeds 1 speaker and the starboard run feeds 3. I'm not sure why they have access in the starboard side of that rear crossbar only.