[lizziemeister'sV6]

Are you starting with your old tail lite/brake housings or getting new ones. If you can salvage enough using the original pieces I would start at the closest place near the firewall where there is good wire and run heavy- duty trailer wire to the rear bumper - from there you can wire your trailer plug and finish at the tail- lights. Do this for sure if your planning on pulling a trailer that has electric brakes - do it once and do it right. I'm not much on pre-made wiring harness that you up cutting anyhow.