I am trying to find the wire colors of the rear door speakers and/or the subwoofer. I am adding an aftermarket subwoofer and I need something to tap into. I will most likely tap into the wire at the amplifier, but there are about 100 wires coming out of it so I have no idea which ones are the right ones. I know I can remove the rear cover and pull out the subwoofer and tap in there, but I would really like that to be a last resort, coming right from the amp is much easier for my install.