Epson EL 486UC - Manual (Page 60)

Once the connectors reach the slot, push the card in firmly
(but carefully) to insert it fully. You should feel the card fit
into place. If it does not go in smoothly, do not force it; pull
the card all the way out and try again.
6. Secure the end of the card to the computer with the retaining
screw.
Removing an Option Card
You may need to remove an option card installed in your
computer to access components on the main system board-to
change a jumper setting, for example. You may also want to
remove a card if you no longer need it. Refer to the option card
illustration on page 3-16 and follow these steps:
1. Remove the retaining screw securing the option card to the
computer. Then pull the card straight out of the slot.
2. Set the card aside with the component side facing up
Removing the Option Card Connector Board
You may need to remove the option card connector board to
replace the microprocessor installed on your system board.
Follow these steps:
1. Remove any option cards from the connector board (see the
section above).
Installing and Removing Options 3-17