Samsung 6050 - Manual (Page 76)

6-8 Printer Options
Second Cassette
You can install an optional 250-sheet paper cassette. The cassette
consists of a support unit and a paper cassette.
Installing Second Cassette
If your printer is already set up, make sure the printer power is off.
Unplug the power cord and disconnect the printer cable attached to
the printer.
1. Locate the following parts located on the top surface of the
support unit ; the tabs, and the connector.
Support unit
Paper cassette
Tab
Tab
Connector