Ford Factory DVD

I have a 2003 Ford Expedition with a factory installed DVD player.  I am attempting to install wireless headsets to the system.  Does anyone have the wiring harness schematic for the player and/or stereo?  The DVD player is a Delphi.  When you drop the unit from the ceiling, the wires (bundled together, no individual outputs) plug into the car's system.  This connection appears to have a duplicate set of multi-colored wires.  I presume that one set runs to the stereo and one set runs to the center console.  The stereo is dual zone so that the rear can be operated independently.  The wireless headsets are Alpine and come with the appropriate connecting wires.  The only issue is which of the wires is the audio left and right on the car stereo?  Thanks for the help. Boy Gomes.

Doesn't the rear seat control panel have headphone jacks?  Maybe if you got behind there, it would be clear which wires head to the jacks--- you could either tap in there, or at the very least, you'd know what color they are.

It does.  I did think of that but must have forgotten.  Thanks for the reminder.  I'll give it a shot and hope for success.  Thanks again.Thanks for the help. Boy Gomes.