Is it safe to screw a C-TEK battery charger connector onto the POS - NEG terminals inside the black box in the engine bay which is highlighted in the photo? This box is used to jump start cars with dead battery. I have fitted the same C-TEK connector to my bat in the trunk, depending how I park my car in the garage I would like to charge my bat either from the front or the rear. Did anyone fit this connector in the engine room? I don't want to fry any electronics so my Q is? Is it safe to charge the battery from the engine bay?