I have included three pictures that show my routing of pitot line, wiring and the wing tanks that I am installing.
Takes a lot of planning to get the holes in the wing bottom and top to line up with the tank drain, vent and filler cap. I had to make a mock-up of the tank to locate the holes in the skin. A nose rib had to be replaced (supplied in the kit) as it had to be moved inboard to make space for the tank.
The wiring was not complete and was not done correctly. It was laying on the bottom of the wing and routed through lighting hoes and not secured. The wires are now routed to protect them from vibration. The wiring is for navigation lights, strobes and fuel sending unit. The pitot tube had not been installed. That was another reason to open up the wing.