Just want to make sure that I dont mess anything up now. On thursday I am going to buy a sub + amp. Now I noticed on my S60t5 w. premium sound that I have RCA cables already that connect to the 6*9speakers in the back. Would unhooking one of those and connecting it to the amp be bad? I realize I would be one speaker short, but I dont really care about that because I never have passengers anyways.

Also, what is the correct way to connect the amp to the battery without setting any SRS messages? I read about something like that once and really want to avoid that.

Any other tips/tricks?

Very thankful