3.   Snap the locking clips into the notches located at the back of the duplex unit and the support unit. 4.   Snap the locking clips into the notches located at the front of the duplex unit and the support unit, as follows: a.   Remove the duplex paper tray completely and then slide the 500-sheet paper tray out until the two locking clips at the front of the duplex unit are clearly
visible. Chapter 7.   Installing Printer Options 131