Match-drilled screw holes for wire cover plate, then drilled holes in baggage wall for nutplates. Trimmed a notch in the plate for the DVR wires, then test-fitted various rubber grommets until I found one that would work. Sanded and filed all edges, then pre-bent the side edges of the cover plate. Cut a small notch in the flange of the baggage wall to allow the rubber grommet to sit flush.
The connector and harness will hardly be noticable behind the DVR unit.
This is the view of the harness as it exits the back of the baggage compartment wall.