Canon BJ-230 user manual

5.Fit the ink cartridge over the yellow mounting base with the print head facing down. (When installed correctly, the label on the cartridge will be upside down.)

CAUTION: Avoid touching the yellow mounting base on which you place the cartridge--especially the circuit board on the side of the mounting base and the film cable that extends from the cartridge holder.

6. Push the lock lever down until it snaps into place.