The RH headlamp diaphragm flange. We mark the flanges heavily so that they can be accurately spot-welded into place. We must do this with the bonnet dissasembled and stripped down to just the center section because the tongs won’t reach otherwise. DON’T DO IT THIS WAY on your bonded flanges! Once you get this far, remove the flange, load it and the skin up with bonding, and bolt it back into place.