Stupid question but what is the PROPER way to safely remove an amp from your car? Do you remove the ground first? from the amp or the battery? also with positive?. It's been a while since I removed them, don't want to ruin anything. I hear so many ways to do it but there should be the right way. I was not sure if I could just take the Power and ground out of the amp terminals or if they had to come off the battery first. Same with installing them? Thanks