Nintendo sideart replacement

[Nizz]

Hi all. I'm new to arcade collecting, just got my first machine, a Popeye. It's in mostly great condition, I just need to replace the sideart. I'm having trouble removing the bolts. They are just spinning. Any tips?

[darkcat1]

Well I have had tough to remove bolts before and I usually had to hang on to a part of them with vice grips or another pair of pliers

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[John's Arcade]

if the carriage heads are spinning, it can be tricky. Try tightening it up all the way then loosening again. You need the heads to be in the square hole so they can't spin.