so to start off. there are a few ways you can do this.
of course we need to run 3 wires.
we need a power wire that will become hot on command that will power the light and send signal to camera. i wired mine into my reverse light and i will show you a few pic here in a min. (ground is near by wire 2)
so those are 2 wires. power and ground.
the final wire we need to run is a RCA video cable. (mist video game consoles have a yellow red and white. we are going to use the yellow for video) but we are not going to run the red and white. only buy a single RCA. Also i had to use a female to female adapter because my RCA cable was too short.
so those are our 3 wires.
oops i forgot. we need 1 more wire to run from power source to the head unit so that the back up screen know when to turn on via a small power supply.
so those are our wires. here are some pictures...
(wait im scribbling) .....

This part sucked! getting the RCA through the rubber hose was annight mare with no room!

a coat hanger made it easy to stuck down the pannel where the hatch support shock mounts. but still tight room

I installed reverse lights to help because of tinted windows and give more light since my tail lights r tinted

on the top left of the back window u can see the remote wire that sends the power signal to the head unit to know when the reverse camera in on

Police give me crap because they cant see where i am from, (only when i get pulled over, but never been pulled over becaseu they cant see it. they just mention it. i think of it the same as having a license plate frame around it. most cars do and it covers up the state.