9.   Use a flathead screwdriver or the flat rectangular key stored inside the vertical section to remove the plastic cover to the right of the duplex chute. Note:   Store the plastic cover and the metal key inside the vertical section. 10.   Facing the front of the printer, hold the printer by its corners, and set it on top of the duplex unit. Note:   Make sure you align the right side of the duplex unit with the right side of
the printer. Chapter 7.   Installing Printer Options 117