When I took the cosmetic airbox cover off (the body panel one with EBR decals on it), the left rear plastic tab by the front left seat corner just had a bolt through it with no nut on the other side and the metal tab it goes into is not threaded. The only thing holding it in was the black plastic sub filler panel that fits inside the rear magnesium subframe. Is this correct, or am I missing a nut or washer and nut? Or something else? I put it back together the same way and it works, but doesn't seem right to me.