Interesting post and following. I bought a used abused cut Bally WPC89 set of harnesses to a Doctor Who that I am patching together. What seems to be missing so far, is the cable from the Back Box lights to the power board. As well as some parts of the lower cabinet harness to the flippers and coin door. But then again, it is such a tangled mess, it is hard to say what I have. All the coils, leaf switches, targets, lights were cut off. I am tracing one color wire at a time to the connectors that go to the back box. This is not plug and playtime. I am considering adding wired connectors to all the coils, so that I can reach the cut wire ends.