I see several aftermarket backup cameras with RCA output that claims to connect to any in vehicle monitor. Does anyone know if the 2008 Navigation system has an RCA output connection? It looks as simple as connecting the wires to the backup lights and the RCA to the Nav screen.Just not sure how difficult it is to connect to the Nav. I know some shops install them to the Nav system but not sure if they have to splice into the correct wire or if it's as simple has plugging it in. Anyone know?