should you conect your ground for amp to your - battery terminal frame of your car or both?//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif
the best plasc imo is the bolt used to holt the nearest seatbelt you just get A terminal the rite size and put the bolt through the hole and connect the wire to the amp then donebut make sure the bolt and seatbelt clasp mount are free from paint and rust