Zack, maybe the black 14/12 off the 100-amp QO goes to the top of that cartridge fuse? A sure warning that there’s a fuse under the deadfront might be to chain a pair of fuse pullers to the backboard.
The precision bathtub caulk on the right-side locknuts is a nice touch.
Some days you gotta' laugh just to keep from crying.
—Bjarn