I have a spring in the coin unit that appears to be out of place. It is very close to the contact of one of the switches. If someone can take a picture of how this spring is supposed to be seated it would be great. I found this while chasing a short that ended up in the Coin unit. This spring completely melted in the secont slot unit so I was thinking that this may have been an issue. It actually was not the issue as I found a wire that was worn through the insulation.
Here is a video of the spring in question.
The machine is a EM Gottlieb Spirit Of 76. (1975)