'40 Std coupe seat

[russcc]

New again to '40's. Had a coupe, tudor and fordoor in the early '60s, but forgot a lot of what little I knew.

I would like to get the god awful seat upholstery out of the coupe, but am unsure what how you get the side panels of the seat. I see how you undo the 4 mounting bolts to get the seat off the floor brackets, but the side panels are the question. Are those round head bolts or ? Please see photo.