It takes a lot of head scratching and cyphering and then determining the best route for the LAST electrical harness to get the wires where they need to be. This harness has wires going to the aft, mid, and front of the fuselage. It has the aileron trim indicators, elevator trim indicators, rear seater smart glide switch wiring, fuel tank indicators, main bus volts, etc., etc. So these wires can run along the longerons down the left side of the fuse.