possible solutions
https://www.amazon.com/dp/B08629JN6M
https://www.amazon.com/CERRXIAN-Speaker-Connector-Adapter-10-Pack/dp/B07QD3GW1H
https://www.amazon.com/CERRXIAN-Plated-Speaker-Connector-Adapter/dp/B07TYR46BK
https://www.parts-express.com/Gold-12-AWG-Speaker-Pin-Connector-Pair-with-Set-Screws-091-300
or just use AWG16 like I do.