Epson Equity 320SX PLUS - Manual (Page 113)

Follow these steps to install an option card:
1. If you are installing an option card that controls a mouse,
you need to change the setting of jumper J4 on the main
system board before you install the card. If you install a
display adapter card, you may need to change the
settings of jumpers Jl, J3, and J5. See page 6-2 for
instructions.
2. Remove the retaining screw from the top of the metal
option slot cover; hold on to the screw so it doesn’t fall
into the computer. Lift out the slot cover.
Keep the screw to secure the option card to the computer.
Store the slot cover in a safe place in case you remove the
option card later.
Installing and Removing Options 6-11