Samsung ML--6100 - Manual (Page 97)

6. 14 Printer Options
Option Cassette
You can increase the paper handling capacity of your ML-6100 by
installing the option cassette, which consists of two components, as
shown in Figure 6.1.
Review the precautions on page 6.1 and then follow this procedure to
install option cassette in your printer.
1. Turn off the printer and disconnect the power cord.
Support unit
Paper tray
Figure 6.1