hmm...yea seems like u broke the outer connector or ring of the rca plug. Even if u attempted to solder that, it won't help. That's a pretty delicate area that. try this...put the rca cable in the plub and using ur hand, push it in the keep it in there. see if both subs hit. if so u can either go back to Best Buy and try to get a new one or do it the ghetto way and tape the sucka in!