I have a 2021 Reflection. I had previously wired a backup camera and wireless transmitter on the rear but am unhappy with the results. I am replacing the transmitter with a video wire. I am looking for suggestions on snaking the wire up through the rear wall. I have looked behind a clearance light and behind the stock camera mount and have seen the aluminum frame that the wires are routed through.

I will be running this wire from the kingpin to the rear camera location. Is there a way to snake a wire from inside the coroplast through the back wall to the camera? Is my best best going via the roof? I also am not sure of how to route the wire rearward of the pin.

Any guidance is much appreciated.