ExcaliberLand..... I am unable to help with that info as all my Ford products are Pre DVD, I have a '01 Mountaineer and an 89 Bronco.
Best guess would be to pull the radio out of the dash to see the wiring from the backside. I am hoping yours is not one of the custom units that I am seeing on alot of new model cars, and is a standard 1 or 2 DIN setup. If it is the DIN setup, usually you just need the 2 prong Ford Radio pullers to put in either side and click into place for pulling the radio. This is a very simple system that works extremely well, and hopefully has not been engineered out of your year of Ford.
The AV connectors would look similar to the 3 AV connectors that work the Right, Left and Video on your TV at home. If these are connected, then you are probably in good shape there. As for power, that may come from the radio or possibly a direct connection closer to the unit, that I cannot tell.
If it is a Mirror veiwscreen, then you would possibly need to pull the headliner down near the mirror and find the wires there. Same thing applies, look for the AV connection that looks like a larger plug, if it is connected you have verified there.
You may have a cut wire somewhere also, so finding both ends of the Video cable (camera and viewfinder) and verifying continuity with a test light would be a good idea.