We did this on this on the old six card dime machines. There were many that were painted this ugly two-toned yellowish and pink and those were just the ones we wanted. We'd take one of the old hand held drills, have someone stand in front blocking, drill hole(s) in pink painted area then use a coat hanger to activate the switch and lite the number. Never activated more than one to two numbers at one time as it was hard to do but, hey, 5 numbers in row in the yellow back then would pay 20 bucks which I don't have to say was a lot of money for a kid back in the late 60's and early 70's. We always drilled in the pink paint because it was damn near an exact match in color to Bazooka bubblegum which is what we would plug the hole with on the cab. Seemed like it took the operators of the time a couple weeks to figure out what the hell was going on and by then we had moved on. Best places were bars as they were dark and not many took notice to what we were doing.