No problem about the questions. You'll want an inline fuse holder and a fuse to put in it. Both are available at radioshack. I don't have a fuse because I'm using a 10ah car jumper pack, so it has all that built in. You'll need a fuse bigger than the amount of amps you'll be drawing. Let's say you have 20w and a 35w, thats 55w. 55w/12v = 4.58amps. You could go with a 5amp fuse, but it'd be cutting it close. I'd just use a 10amp.