Epson Expression 1680 - Manual (Page 99)

4-30 Options
2. Use a cross-head screwdriver to remove the two screws
securing the shield plate to the optional interface slot; then
remove the plate. Be sure to keep both screws; you may need
to use them again if you re-install the shield plate.
c
Caution:
Static electricity can damage electronic components.
Discharge static electricity by touching the metal frame of
your scanner before handling the interface board.
3. Insert the Scanner I/F Card along the side guide rails into the
expansion slot in the optional interface slot.