OK, I see yhe pictures you took of the cable in on the back of the display. Did you tap into the +- wires on the composite cable to also connect the video feed to the 4 pin molex connector? I assume the other two wires in the molex are power for the camera?
I have gathered all of the pieces and taken the dash apart once to see if there might be any issues to contend with. If you can clarify these las couple of details I am ready to go!