The red upper flash should have a connection to one of the flash bulbs
in the back box. I don't remember which one, but there are 2 that flash under the P on pinball
and the M on magic image, and I think the red dome should be flashing with one of them,
and green dome with the other in attract mode.
Also you can't use led 906's in Capcoms, must be incandescents.