The fuse box needs to be unbolted from the fender. Then remove the bottom cover by prying the little retaining plastic clips over the catches this will expose the wires and connectors on the under side. Next the sub box or holder that I was talking about is held up in the main box with little catches and plastic type hooks pry them over the hooks so that it will release the sub holder out of the main box. I believe it pushes down out of the main box not up but you should be able to what direction it is going to go. Pull the whole sub assembly out far enough to get access to the small bolts. Take the bolts out don't worry about the nuts they won't go anywhere. Pull what is left of the fuse out and push the new one in and tighten the bolts.
Attached is a picture that might help. I circled the latches or catches.
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