If you have the wall you do not need it in a box.If you have a cell in the trunk you need the wall .The battery looks better in a box though.The battery has to be bolted with a least 3/8 rods or better no j bolts.if you use all thread tech prefers the nuts on bottom to be welded.The cutoff switch has to be marked in a easy access location and it has to kill the car and elec pump.On that note my battery has never been checked.