I recently bought an aftermarket overhead DVD player to install. Can someone tell me how and where to install the DVD player? I don't have a sunroof. Also, how will I wore it to the accessory wires? I do t have a wrong diagram available. I have been unable to find any diagrams for both the room layout and wiring. I prefer to do all work myself and I don't want to take it to a shop to complete it. Any advice would be great.