Originally Posted by SiouxsieCat
In the top image, it appears there is a line going up front with an in-line fuse coming out of the fuzeblock.
I'm not an electrician, but that is redundant and not really needed, right?
There's a lot of misunderstanding about what fuses do. The individual fuses protect the individual circuits, but they do not protect the upstream wiring in the event of damage to the fuzeblock itself or to the supply wire.
A fuse on the power supply lead protects the power supply lead and to some extent the upstream components (just the battery in this case) in the event of a short. So if the seat pinched the supply wire against the shock mount bolt and caused a short, the fuse would go first. Notice how the fuse is very close to the battery? That's well done; there is very little unprotected wiring in this installation.