Solar controller Victron energy MPPT100/20

A hello to the experts, I hope someone can help me at short notice, because have my seat halfway removed and can not move the Womo so. 1. Question: The controller has a fuse with 20 A. Is this fuse in the plus supply line to the battery? If so, I can cut this damn fuse out in the middle of the plus supply line. Duese was installed by a specialist company so intelligently under the seat that I do not decompose the fuse without the rotating seat 2.I charge the mounting battery “Exide Maritim&Multifit ES 900, 900Wh. 80Ah. This seems to be a gel battery. How are the ideal settings on the MPPT/20 for this? Unfortunately, I adjusted everything when troubleshooting. The fuse on the controller was fine. After the charge was no longer fiunctionated, I finally checked out the side seat and surprisingly still found a stiff and defective “flying” fuse. I deny, this is very good. Vieken Thanks and b ́healthy stay and make, if you do not have to travel already.