Battery cut off switch

when i wired my car i ran a 1/0 cable from the battery in the trunk to my kill switch then to the starter post. my alt charge wire goes to the starter lug and that is it. i have a 6 ga wire that is run on the other 2 posts on my kill switch. this wire goes to a buss bar under the dash. this feeds my ignition, fuel pump and everything else. when i hit the switch i kill any and all power from the switch forward.