All pics are thumbnails, click for full sized.
Car, just to get it out of the way:
Location that I found behind the seat, made to house the optional factory subwoofer:
How the components fit in the box, all attached to a custom bent sheet metal half-case:
*UPDATE: Wiring Diagram*
The monitor is patched into one of the Opus PSU's Molex connectors, and all three RCA cables run up the center console, one to the monitor carrying TV-Out, and two to the Head unit.