Hurricane Hinge Install Question

Installing the hurricane hinge on the hatch. I had planned on screwing the hinge flange on the inside edge of hatch.
I'm wondering (asking) if there should also be a row of screws holding it from the outside surface.... holding that exterior
flange up against the aluminum sheet surface.
Thank you for the help.
John
I'm wondering (asking) if there should also be a row of screws holding it from the outside surface.... holding that exterior
flange up against the aluminum sheet surface.
Thank you for the help.
John