Bucket seat floor bracket broke thru pan

Remove the floor brace . Overlap a piece from another car flanging it with a flange tool. Plug weld it on and weld the seam from the underside so you cannot see the seam. Replace the floor brace and you are done. Looks like it broke from a heavy weight like me sitting in it for many years. Don't butt weld it your wasting your time it will brake again unless it is tig welded. That would take a lot of cleaning of the metal.