If it's anything like my CX-9 (and it's probably identical) you can't capture the signal before it hits the amp. It's a CANBUS signal, and therefore useless to us unless you're an electrical engineer. And yeah, I wish I was.What are the colour codes of wiring for rear speakers on input side of amp - 2023 amp under seat model as I will make loom to save cutting wires and fitting LOC as only usually 3V max anyway?