Epson 10020 - Manual (Page 110)

4. Grip the card firmly by the top comers. Hold it so the
connector pins are pointing down and the components
facing the inside of the computer, as shown below.
are
5.
6.
Insert the card straight down into the slot. Once the
connector pins are in the connector slot, push down firmly
(but carefully) to fully insert the card. If the connector pins
do not seem to be going in smoothly, do not force the card;
pull it all the way out and try again. Be sure to keep the
card straight.
Secure the retaining bracket to the frame of the computer
with the small screw and washer. Also replace the
grounding tab if there is one.
4-6 Installing Option Cards