They had no choice but to miss it. The fuel filler door on the TR is up on the rear hood's side buttresses. On the real car the filler neck goes up in the hallow of the buttress, accessible through a circular door on the side, which makes opening the engine bay unnecessary. Making this detail on the kit would be nearly impossible and odd looking. And Atin actually has made it way low, as it should get up way above the plenum level.