having plenty of experience with those fuse holders and relays etc. from my E-code headlamp and 80/100 bulb project, I had plenty of spares. I used an ATC fuse holder very similar to this since its leads are 12g braided copper.
a couple of ring terminals and a 30A fuse (do to think thats high enough?). blower works like a champ so far. I can post picts if you really want. its pretty straight forward.