Something way wrong with that statement.
The top of the pic... that's the line in side of the fuse box. Each buss bar should need only 1 supply wire. The bottom of the pic is branch circuits out. The only current path from top to bottom or in to out should be through a fuse. So like the drawing above jumper from one buss bar to another labelled 14-BK is more correct. Line out to a tach or anything else would be at bottom, after the fuse.
