One of the fun things about building electric guitars is wiring them up. Factory wiring tends to be simple, minimizing the amount of fussy handwork required. Many manufacturers keep strictly to 'classic' designs, seldom if ever changing anything. These designs are generally simplistic, often crude or even stupid, and sometimes outright flawed. There is no need for you to do this. I don't. Here are some of the things I have done over the years. I don't claim to have invented any of this, although some of these schematics I have never seen anywhere else, and had to derive them myself.
This was my third go at a 325 bass. The first one was unbalanced with this long neck, and the second suffered a router mishap. Eventually, I salvaged both of those, but first I took all the good parts and did this. Fender-type alder body with 3-tone sunburst, single binding. Surface-mounted pickups, active electronics. Finished entirely in polyurethane.