I am pretty sure that it is not a standard RCA end. It (the mirror) has a harness that connects to the car. In that harness there should be 3 wires in addition to wires that feed to a non display mirror. These wires should be a video +, video -, and a reverse 12v. The reverse 12volt is what turns on the lcd when the car gets put into reverse.

What you probably have to do is run a wire from the reverse wire in the kick panel to the mirror for power and then cut off the RCA jack to get the outer/inner (+/-) wires and tap those into the mirror harness as well.

There are a lot of shoulds and probablys in my post but I have started doing my homework. I am installing an OEM reverse camera into my 07 expedition which did not come with the wiring for the camera. I am having to run my own wiring because i am going to hook up the camera to the navigation unit and the mirror. I am getting the for sure info on how to wire the mirror, and as soon as i find out I will post again.