I have a Bally Knockout which is boxing themed so I thought it would be cool to add a bell to the machine that would ring like a boxing bell when the game starts or maybe at each ball. I bought an old alarm bell and I'm trying to figure out how to wire it into the game. I thought about wiring it to either the credit/start button or maybe the ball count unit. I have verified the bell works on a 9 Volt battery. My only choices on the machine are 6 volts or 50 volts so I'm hoping 6 volts will work. Can someone take a look at the bell wiring and the schematic and give me some advice on how(or even if) I can achieve this? I can provide better closeups of schematic if needed.

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Interesting suggestions. Never even considered that direction. Do you think a leaf switch would work?

Thanks for the suggestions guys. I ended up going with an external power supply from Amazon hooked up to a leaf switch triggered by the ball kick out arm. It works perfectly! Exactly as I imagined. The bell rings to start the "round" every time a ball kicks out.

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Nope. Unfortunately there is not. This game doesn't have one. Would have been a bit easier if it did. Lol