Dell 3110CN Owner's Manual page 63

Completely remove the seal from the print cartridge by pulling the tab on the end of the print
3.
cartridge.
NOTE:
Pull the seal out straight. Pulling the seal diagonally may tear it.
Grasp both handles of the print cartridge with the label facing up and slide the cartridge into
4.
the same color slot. Make sure the cartridge is fully inserted.
63
Maintenance