I had one on my kitcar in the door pillar aeria it served 2 purposes a in case of wiring fire and take the key out and no one could start it as the battery was behind the seatHello MoreWellie,
if you fit a competition isolator that will take care of that problem:- http://www.vehicle-wiring-products.eu/product.php/181/competition-battery-isolator-switch
Alec
if you fit a competition isolator