Just a note on the differences in wire colors.

Gottlieb didn't run out of wire. They used single color wire, the cream colored wire you see most of the time, and had a machine with Sharpie like pens that put the traces on there.

Lots of times, there will be a wire color on the schematic, then something like this (300) after it indicating a wire change. If you check those numbers against the chart on the schematic, you'll see that those numbers most of the time correspond to the correct wire color.