Holes should be pilot drilled, to the correct depth, otherwise the screw will bottom out and you will round out the screw head.
Pilot Drill, correct fitting screw driver, and a bit of hand soap (block) or candle wax on the screw threads.
Lots of holes.. so a job not to ne rushed
Mark the hoes thru the achie head plate with a scriber or nail
I use a hand pinion wirly drill and slow and steady as to clear the hole and not break the drill bit.
Good Luck