Brother HL 2700CN - Manual (Page 96)

OPTIONS 4 - 8
4
Use the handholds of the duplex unit to lift it up.
Figure 4-15
5
Insert the bottom of the duplex unit into the grooves in the printer, and then insert both the hooks of
the duplex unit to the holes of the printer.
Figure 4-16
6
Open the duplex back cover and duplex inside unit.
Figure 4-17