Rewiring the race car.

You can buy hundreds, maybe thousands of types of terminal strip/ buss bars. Search around Mouser Electronics for one. Many are available with jumpers between terminals, or a strip that is made as one buss.

It troubles me a bit.........all that stuff on that terminal, are the circuits fused individually? Doesn't appear.

Hella makes some little stand alone fuse block/ panels there are many others