speaker cable connection

Copper to the red, silver to the black. With that cable. Either way as long as it's all the same way. BUT for ease copper / RED, silver / black. I'd use SOOW or SJOOW before that though.. 99.999 copper #18-8, pick your size.. US materials.. I use it all the time on passive sub cables.

Regards

Thank  you, I appreciate your help

IN PHASE: always make sure both ends (amp and speaker), and both speakers are the same + and -

I will. Thank you for the help. It is appreciated.