Canon imagePRESS C1+ Reference Manual page 467

1
Open the front cover of the finisher.
The Optional Saddle Finisher-AA2
2
Lift and pull out the staple case from the stapler unit, holding it by its
green tab.
3
Place the staple case, as shown below, press the area indicated by
PUSH, and then pull out the staple cartridge.
Finisher-AA1/Saddle Finisher-AA2/Punch Unit-L1/N1/P1 (Optional)
The Optional Finisher-AA1
7
7-33