Lexmark MS810 Quick Reference page 26

2
Open the stapler door.
3
Pull down the latch of the staple cartridge holder, and then pull the
holder out of the printer.
4
Use the metal tab to lift the staple guard, and then remove any
loose staples.
5 Press down the staple guard until it clicks into place.
26
6
Press the staples against the metal bracket.
Note: If the staples are at the rear of the cartridge, then shake
the cartridge downward to bring the staples near the metal
bracket.