Wiring question

[Caymanboy]

My, it's a testy group out there today!!! Mus b d heat!!!
Aneway, my two cents, and I am sure a ABYC electrician may chime in.
My concern would be the supply wire size on both the positive and the grounds. Since the load wires appear to be the same gauge or maybe a gauge smaller if you add up the load amperage those are capable of, I am pretty sure the supply wires cannot carry the total load effectively if everything was turned on at the same time.
Everyone has there own personal preference on where things should be mounted. But from personnal experience, when a fuse blows on me, it is ususlly at night, then I am digging in a console, which has been stacked with everyhting I need to stay alive and is quite dark. I have used fuses, mounted next to my switches (made by Vector LED), (I coat the fuses in a dielectric grease) and that seems to have worked on my projects for years. But, like I say, different things work for different folks. The common ground is for us all to help each other, do what we can, with the tools and supplies we have, with what we want to spend.