Hi and thanks for the thumbs up. To answer you question, Yes, there is a 5 amp fuse. If you look at the third pic, follow the pos wire from the magic block that is sitting on the John Deere Tag. As it goes down and across that bigger black wire/tube, you will see a little black thing, then more wire. That is the fuse holder already wired in when I got the blocks. It came with a two fuses, they are the barrel kind, not the blade, but the thing just screws apart. I had already bought a blade type but didn't use it. I'll use it on something else. The blocks connect to the battery screws with those little crimp connectors, with the hole in them, (don't know exactly what you call them ) and they were already installed and heat shrinked. The only thing you have to understand is that these blocks are usually used for LED lighting on a motorcycle so the holes for the connectors to the battery are for a smaller bolt. I had to , VERY CAREFULLY, drill out the holes for the bolts in the larger car type battery in the JD tractors. Sorry I didn't think to get pictures of this but if anyone wants to see how they connect, I'll grab a pic or two. The blocks are really neat though. Like I explained, if you have some of the Led work lights or other things you need to power with the battery, you can just use the leads to connect to the blocks, Strip wire, there is a guage on the back of the blocks for correct length strip, insert wire, and lock the orange lever down. You would have to wire in a on/off switch between the item and the block but you would not have to keep stacking the connectors onto the battery bolts themselves and the blocks are easier to get at if you want to change or dissconnect anything. If you want to check any other type of LED lighting for accessories , just google "Custom Dynamics". They don't have anything like work lightst or replacement bulbs, more for Fancy stuff to light up your ride. take care
Jerry in Wisconsin