I use larger conductors and put buss bars near the loads. They'll be one for the engine and electronics, one under the dash, and one out back. Been doing it that way since the 90s when I was taught that by a friend who wired 6-7 cars a year on the side.

Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.