Sorry Kris I'm not trying to make the question hard to understand. I guess I think people can read minds. In the big three up grades I see,people LEAVE the stock wire and distribution block and ADD the extra wire and in line fuse. In my case I REPLACED the distribution block and wire with ought gauge and fuse and 4 gauge ground but, DIDN'T add a second wire and fuse. Is the reason people leave the factory wire and block is because they are trying to help a factory alternator keep up with the load where as with me having a high out put alt and ought gauge there is no real reason to add the 2nd wire and fuse but, add a second battery and isolator when the time comes?