I cut penitrations in the fuselage side skins for the wing wiring. Then made up support brackets for molex plugs for the Nav/strobe wingtip lights, pitot heat, fuel quanity wires. I wanted thes plugs to be in the fuselage protected from moisture. The ADAHARS wiring also passes thru, but with out a plug. This harness plugs directly into the EFIS on its own wiring run so it will be easy to remove.