Ah ha! I poked around again and now see how the loop can be taken off and the fiber optic connection gets inserted into the black harness which goes to the dvd unit.
Certainly makes sense that the DVD unit is bad, but I would imagine that once I get a good one, it's just a matter of finding a proper green harness and splicing on that cut yellow/red wire. I didn't unwrap all the way, but it appears to be just one wire and not two.
N62b44, thanks for the offer but what do you mean about the reflash? Tell me more. Are you in Atlanta?
Thanks for everyone's help -- I'm getting closer!