Measured and added marks for the hole to pass the wires through to the wingtip light. cut said hole and matched drilled all necessary holes for the wingtip light mount fiberglass piece. Clecoed wingtip closeout back on after vacuuming the inside out. Started to rivet the wing tip closeout onto the plane. Next we'll further dimple some holes for the inspection panel and finish up the wing tip, then mount the light.