It plugs into the back of the dvd rom, so you will need to remove it from the dash unless you can get the harness out without taking it out.
Towards the midde of the unit there are 2 harnesses plugged in. one grey, one white. The white one which is on the drivers side is removed and you new harness is plugged in to the back of the dvd rom and the original harness plugs into your interceptor harness.
Hope that helps.
Cheers
Andy