I bought an aftermarket camera that's like ford's, but it just slips over the old mirror. Thing is great, shoots 4k and is not integrated to the car's system. Also has voice commands, so its super easy to use the real mirror or any other functions. Screen in the mirror is the way.
Not him, but the wire goes up into the ceiling plastic and around the side, under the plastic, and only comes out around the cigarette lighter. The "back" camera is usually built into the same unit. The advantage over what he is describing is that people often break into cars to steal the more visible (non-mirror) cameras.
Yep, other guy is correct, and wires were my first concern, but they are long and you just shim them in between the panels around and down the windows. Same with the back, but there you might have to get more creative running the wire and mounting the camera depending on vehicle.
