Epson AcuLaser C9200 Series - Manual (Page 127)

4. Install the three stabilizers with screws.
*
* tab
Note:
The stabilizer for the right side has a tab. Insert it into the hole before tightening the screw.
5. Set the lowest optional paper cassette unit on the printer stand aligning the marks.
EPSON AcuLaser C9200 Series User's Guide
Installing Options 127