On video machines, the switch is moved next to the bill validator just under the main door switch. There's a metal bracket that holds the switch, in front of this metal bracket there's a plunger that is pushed by a metal protrusion from the belly door, located on the top as you close the door. Photos enclosed. In my case, I removed the switch out of the bracket, and it is in a normally closed position, just makes it easier to troubleshoot blown bulbs, etc since it allows me to open the belly door without causing a tilt.