I am trying to rework a 77 Gottlieb fire queen that I've owned since 1990. was working good until 96 when I had a house fire. stored the pin in a storage building until now. been going thru all the score reels, credit unit, and got to player unit and thought I had the "(outer switch, outer arm)"marked with a sharpie. after cleaning I lost my marks. did not tear it all the way down, just cleaned the outer contacts. this unit has 3 cams inside. any help will be greatly appreciated..