I just bought a lawnboy self propelled lawn mower with electric start. Can you help me figure out the fuse?

The directions says to plug a fuse into the battery. I cannot figure out what they are talking about. There is nothing in the box that looks like a fuse. Am I missing something? Do you now anything about a lawnboy self propelled lawn mower with electric start. Did someone at the store take the fuse out of the box? Where would it be? Am I just stupid cause I cannot find anything that looks like a fuse?