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Museum of the Game® & International Arcade Museum® Forums
This is the best way I've found to install any boards, fixtures, or anything else with screw holes without using a tape measure, pens, sharpies, whatever...
Put a piece of painters tape over the mounting hole locations on your board / marquee light (power strip in my example)
Poke holes exactly where you need the mounting screws.
Remove the tape and place it where you want to install the board/device.
Put screws or mounting hardware right where the holes in the tape are.