Hey there, I'm looking to put some speakers in behind the seats of my Hilux, I've taken the radio out and had a look behind it and I can't really tell where I'd need to go to hook the speakers up to. I know it's capable to add 'rear' speakers to as the FAD setting on the radio has L(0-7) and R(0-7). I've found http://www.installdr.com/Harnesses/Toyota-Wiring.pdf < that while searching on the internet, I'm just not sure if it's gonna help me or not. Thanks!