Hey welcome back!
Similar question here
I have this type and like it, it’s a mono, never had any problems,
I had a vintage amp once and because I had the parts and a solder iron, I put two neutrik jack sockets on the end of speaker cable. Looked ridiculous, but if you trust your own soldering then that’s a good option .
Neurik have this NA3JJ - Neutrik
But it does not state power handling. The connection will be rated I am just unsure of the internal wiring. However it seems you could open it and wire that up.