Epson Expression 1680 Reference Manual page 90

4. Insert the installation screws included with your Automatic
Document Feeder into the holes in the scanner, then use a coin
to tighten them.
5. Remove the protective materials from the Automatic
Document Feeder's mounting hardware.
6. Close the Automatic Document Feeder.
7. Attach the Automatic Document Feeder's connector to the
scanner's option interface.
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Options