you can get plug in adapters so you dont have to cut any of the factory wires. I'd say put the LOC at the deck... use an adapter to plug into the back of the deck... and run the speaker wires directly to the LOC. Run the RCA cables from there to the amps. Then use that speedwire I was talking about, and run from the amps back up to the deck... there, use another adapter to plug into the cars wirring... run the cars power wires to the adapter plugged into the deck, and connect the speedwire to the adapter plugged into the cars harness. Then there is no need to run new wires through the door jambs (which is a total bitch) and everything is just "plug-and-play".