Lexmark W810n - Optra B/W Laser Printer Reference page 173

9
Turn the cartridge holder around to orient it as shown in the
illustration in step 10.
10
Use the metal tab to lift the staple guard, and pull out the
sheet of staples.
Discard the entire sheet.
11
Press down on the staple guard until it snaps securely into
place.
159
Metal tab