AFAIK, there is no actual cabinet wiring diagram available. The bad scan above is nothing more than an mcr3 pcb stack, of which there are are good diagrams available. Tapper and DOT are the same. The video board may be a different revision, but there are good schema available for them all. Not at my desk so i can't tell you which one goes with which revision, but they're readily available.
No one has ever seen or scanned (that i'm aware of) an actual full cabinet harness of either the 2 or 4 player Demo Derby.