I dunno where you'd find an In-line fuse holder connected to an alligator clip. You may have to build one which will possibly involve a bit of soldering. In-line fuses are pretty easy to find at automotive stores (Canadian Tire). Alligator clips are more likely to be found at Electronic stores but you may find them at Canadian Tire. You could also look into just using a good old slide terminal depending on the contacts on your battery.

Now i know i shouldn't ever advocate defeating a fuse but... if it were me i'd cut off the remaining half of the fuse and strip the red wire and crimp on either an alligator clip or slide terminal. Quick, and ez. Done. Just don't hook it up improperly after that.

You could even, in the interim, just twist the bare wire onto your terminal, and then connect the negative. But doing that consistently will keep wearing out the wire.