You could start by figuring out which switch is closed and causing the Score Motor to run.
Prospector Motor (resized).jpg
They'll all have an O-G (orange-green) wire on one side.
Quoted from megoman:This in turn fires the two score resets relays in the back.
Could it be the other way around? A switch on the Reset relay can turn on the Score Motor.
/Mark
BTW, you might get more eyes on this in an EM forum.