Dell 3130cn Color Laser Printer - Manual (Page 219)

4. Release the levers by lifting them upwards and then outwards at both ends of the fuser.
5. 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.
Installing a New Fuser
1. Unpack a new fuser and hold both sides of the fuser with both hands.
2. With the connector of the fuser toward the slot, push the connector into the slot firmly.