Epson FX-2190 Reference Manual page 192

2. Hold the single-bin cut-sheet feeder in both hands. Fit the
notches in the single-bin cut-sheet feeder over the mounting
posts on the back of the high-capacity cut-sheet feeder.
3. Lock the two cut-sheet feeders together by pushing firmly on
the tab locks.
To install the double-bin cut-sheet feeder on your printer, see
"Installing the cut-sheet feeder" on page 172.
186 Options and Consumables