Canon BJC-3000 Series User Manual page 303

5
Set the BJ cartridge in the cartridge holder, then lower the cartridge lock
lever until it locks in place.
Note
When you install the BC-30 Black BJ Cartridge, insert it into the right side
of the cartridge holder.
6
Press in on the tabs of the protective cartridge inserts and remove them.
Fix tabs
Replacing the BJ Cartridge
Routine Maintenance 303