Epson ACULASER M8000 series - Manual (Page 109)

2. Carefully take the optional paper cassette unit out from its carton and place it where you intend
to set up the printer.
Note:
The instructions below describe installing three optional paper cassette units as an example.
3. Confirm the bundled items.
a. optional paper cassette unit
b. fittings
c. stabilizers
4. Pull out the optional paper cassette.
EPSON AcuLaser M8000 Series User's Guide
Installing Options 109