Assembled the fuel tank access cover by adding 10 nut plates to the Zenith-provided cover.
After finishing the access plate cover, I flipped the wing back over to right-side up for the home stretch to completion. Left to do: Fuel tank, landing light, wing locker fasteners.
The nut plates, riveted to the inside of the cover.
The outside of the cover, before installation. It fits up inside the access port.