Don't poke bare wires into any holes. They might not make a good connection and thus will heat up or someone accidentally pulls one of them and kills themselves.

I needed the plug for my AC500.

Personally I went with the bare plug and soldered wires to it that have ring terminals on the other side: https://www.amazon.com/dp/B0B8CQ57DX/

If you go with this one, do make sure that you use heat shrink insulation. You don't want to accidentally create a spark gap.

But there are also versions with cables already attached: https://www.amazon.com/dp/B09X34G9MG