I'm trying to get a line out from the Hu to RCA but this is a headache. I would have taken the back panel as per Andy Macs manual, but I just didn't want to pull out the back covers. Anyway got the sat nav bose RNS-D HU out and saw that a block for front left and right + - is not connected can I take a feed from here? Or from the other block connector where it states line out, but it's a bit complicated 1 wire for right front 2 wires for left front and 1 wire left back and 2 wires for right back. Now how on hell can I convert that to a single speaker without + and - connections....Am I missing something here ?