In the overhead console in the fuselage I installed red map reading lights, pilot cabin and passenger cabin lights. This route back to the empennage to a common ground bus that will go to the negative terminal on the battery. The positive wires route forward along the right side of the cabin. I used Adele clamps to attach the positive wires to the aft fuselage bulkhead. The third picture is the tubing that routes outside air up to the air handler and then into the cabin.
