Brother HL-2600CN Series - Manual (Page 165)

CHAPTER 5 MAINTENANCE
5-53
8. Insert the fixing pins at both sides
of the Duplex Unit into the
installation grooves in the Lower
Tray Unit.
Fig. 5-68
Note
Make sure that the Rear Cover of the Lower Tray Unit is closed.
9. Secure the pawl of the Duplex
Unit into the rectangular hole in
the back of the printer.
Fig. 5-69
10. Open the Duplex Lower Cover
and remove the protective parts.
Close the Duplex Lower Cover.
Fig. 5-70