going to do the big 3 on my hhr but a couple issues come into play , factory battery is located in the trunk my wire the is bolted on the alt runs down to the starter then splits off up to the under the hood fuse box where there is a jump start point then splits again and i imagine from there goese to the trunk where the battery is located ive search and found no big 3 which battery location is in the trunk and should i run double inline fuses if so where any help is appreciate thanks