Canon BJ-200e - Manual (Page 19)

6. Fit the ink cartridge over the yellow mounting base with the print
head facing down. (When installed correctly, the label on the
cartridge will appear upside down.)
7. Push the lock lever down until it snaps into place.
Make sure there is no resistance when you press on the lock lever, and
be sure no gap exists between the ink cartridge and cartridge holder.