Xerox WorkCentre PE120-120i-3124 - Manual (Page 266)

Installing Machine Options D.6
Installing an Optional Tray
You can increase the paper handling capacity of your machine
by installing an optional Tray 2. This tray holds 250 sheets of
paper.
1 Turn the machine off and unplug all cables from the
machine.
2 Remove the packing material from the tray and remove the
tape fixing the interface cable to the tray.
3 Find the location of the connector and the optional tray
positioners.