The screen is friction fit into the cubby that was there, then I just put the cubby back in. I cut slits on each side of the cubby using a dremel and pressed the screen into the gaps. It is TIGHT. I have plenty of pictures of how I did it, but not a lot of time for a write-up yet, so will post more once I get some time. The switch below the screen switches between upper backup cam and lower/hitch view backup cam.