Epson Stylus Color 980 Manual page 211

4. 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 when you reinstall the shield plate.
5. Be sure to set any switches and jumpers on the card. See the
interface card's manual for details. If your interface card has
a jumper labeled JG, make sure that you turn it on, or the card
will not work properly.
6. Slide the interface card along the slots on both sides of the
interface compartment. Push it in firmly to fully insert the
connector at the rear of the interface card into the printer's
internal socket.
Options and Consumable Products
11-3