Charging system

So similar to the ballast resistor providing power to the coil or being bypassed on start. Just making sure that it's sent power when the key is in either position. And I would assume it would be the same of anything that I want to be on when cranking or running, needs to be hooked up to both. So EFI, fuel pump, coil afaik. Right now the first two don't exist on the car, but they will in the future so I'll just set them up with dummy plugs for now.

Anything on the brake light switch?

What they didn't have the ability to have 3 fuses powered at once from the ACC switch so they jumped it internally lmao?? To be fair, I do have my added on tach spaded into the outlet of the instrument lights fuse so it looks kinda jank under there, but at least it dims with the rest of them haha.

After looking at it, it kind of makes sense now. The jumped fuse has to be A/C related which my car has, but I know a lot of them don't. So I guess they just didn't put a fuse in there if the A/C wasn't installed. But what is it protecting? The compressor is the only big thing unless it goes to the bypass switch/resistor.