Dell 3110cn Color Laser Printer - Manual (Page 287)

Hold both sides of the installed fuser, pull it towards the front of the printer to release the connection
on the right side, then lift upward to remove. 5.
Installing a New Fuser
Unpack a new fuser and hold both sides of the fuser with both hands. 1.
With the connector of the fuser toward the slot, push the connector into the slot firmly. 2.