Welcome to the forum and irv2.
You will have a power plug under seat and what happens is the wire is pushed into a wire clip of plug and they can work loose from clip when you turn the set around, check your plug for a loose wire.
The 12v fuse maybe in your main 12v fuse panel.
12v fuse panel locations.
Your fridge should be of a inverter that is supplied 12v to convert to 110 to run your fridge when not on shore power or have the Gen running for 110.
Do you have circuit breakers on the inverter that need to be reset?
Below in my signature are links to many more for yout Bay Star and there is a BS Section in
QT's # 3.