Oki ES9170 Quick Start Manual page 45

Install the staple cartridge.
Return the Hole Punch Unit to its original
position.
Do not put your hand or fingers on the top of the finisher when closing it.
They could be caught and this could injure you.
Carefully return the finisher to its original
position.
Close the front cover of the Finisher.
Replacing Staple Cartridge
3
43