[Healeys] BJ8 rear seat vertical wood question

[Freese, Ken]

The factory parts book lists 1/4 x 1 3/8 countersink screws quantity of
4 for "panel to wheel arch". The screws are CMZ0422. Countersink screws
are correct as you can see the dimples in the sheet metal.
My car seems to have the 4 screws. Does anybody only have 2 screws?
Maybe this changed with the seat belt anchoring change?
Thanks,
Ken Freese
65 BJ8