Sharp AR-405 Operation Manual page 119

Insert the new staple cartridge into the box until it clicks
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in place.
Insert the new cartridge by aligning the arrows on the cartridge
with those on the box. Check that the cartridge locks in place by
pulling it slightly.
The cartridge holds 5,000 staples.
Remove the rear paper and tape from the cartridge.
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Pull them straight. If they are pulled obliquely, the tape may be
torn.
Insert the staple box to the stapler unit until it clicks into
8
place.
Return the stapler unit to face down.
9
Push the finisher toward the copier and latch it in place.
10
FINISHER (AR-FN1N)
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