Quoted from pinballtech:

After over 40 years as a tech I thought I had seen it all, but this takes the cake. Add-ons include relays, wires, beacon, speaker, bells, buzzers, door chime, and the piece de resistance, an old cannister vacuum cleaner under the machine that was also wired in. We spent an hour or two trying to figure it out, but there is so much that has been added to the original wiring it was difficult to "see the light". The guy that did this has passed away so I am on my own here. We are trying to get it going for his daughter, but where do you start? I looked through the notes he had left but there was no clear direction there. Immediate problem is in the scoring, but obviously all these extras were added to that circuitry so the original schematic was no help. Still shaking my head.