Lexmark C910 User Reference Manual page 110

5
Slide the toner cartridge in until the cartridge is fully seated.
6
Push the waste toner arm until it snaps into place over the photodeveloper.
7
Repeat Removing a toner cartridge
install additional toner cartridges.
CAUTION:
Before closing the top cover make sure everyone is away from the printer and the
area under the cover is free of hands, clothing, and other items.
step 2 through Installing a toner cartridge
108
step 6 to