Lexmark C912 User Reference Manual page 147

3
Align the photodeveloper with the slot under the matching color label.
4
While holding the photodeveloper with your left hand and the photodeveloper cover with your
right hand, slide the photodeveloper into the slot until it is fully seated.
As the photodeveloper slides in, slide off the photodeveloper cover.
Maintenance
Replacing a photodeveloper
142
Photodeveloper
cover