Epson Apex 20020, 20040 User Manual page 130

To access the multi-function card jumpers, you need to remove
the card from the computer:
1. Unplug the disk drive cable from the card as shown below.
Pull it straight up and out, then lay it to one side.
2. Remove the retaining screw from the multi-function card
at the back panel of the computer, as shown below.