Battery is good. I've tested the bilge pump running directly off the battery. I do have a cheap harbor freight multi-meter. The pump only pulls 3amps at 12v. I figured the fuse block was a little overboard, but for a few bucks more, I decided to get it (along with an assortment of 3/5/7.5 etc amp fuses) and leave room for future expansion. The big questions is the fuse block. Looking at it confused me. I assumed the 14 terminals, 7 on each side, running down the long sides will receive positive wire. But I wasn't sure what to do with the negative wire. The top of the block has 7 additional terminals, but I wasn't sure what those were for, maybe the negative wire? But if so, why are there only 7 terminals and not 14? I'm sure its simple and obvious, but I'm missing it. Thanks

Here's the pump: Seaflo pump