Well I tapped off the Battery for the POS 12V, tapped off an area with a screw on the chassis for GND, tapped off the bose amp line, to get my own amp to turn on as well, and then tapped off my rear speaker to get the signal to my amp for the Left/Right channels. All of those wires are in the trunk.

Saved me A LOT of time than to run wires and make a mess.

I don't get why you need a aftermarket wire? Makes no sense......