Epson EPL-N7000 Reference Manual page 222

5. Remove the paper cassette from the printer, and secure the
front of the unit to the printer with the remaining two screws,
as shown below.
Note:
If you are installing multiple units, joint all units and the printer
securely in the same manner.
6. Reinsert the paper cassette into the printer.
7. Reconnect all interface cables and the power cord.
8. Plug the printer's power cord into an electrical outlet.
9. Turn on the printer.
To confirm that the option is installed correctly, print a Status
Sheet. See "Printing a Status Sheet" on page 304.
Installing Options
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