IBM Infoprint 1422 User Manual page 128

Supplies and maintenance information
3
Hold the print cartridge by the handle and insert it into the printer:
a Align the tabs on each side of the cartridge with the slots on each side of the print
cartridge cradle.
b Slide the cartridge in until it snaps into place.
4
Close the upper front door.
Make sure the door snaps closed on both sides, or the printer will not function properly.
5
Turn the printer on.
Cradle
Changing the print cartridge
126
Tab