Dell OptiPlex 755 User Manual page 64

1 drive insert
2. If you are replacing an existing media card reader:
Remove the four shoulder screws from the existing media card reader.
3. Insert the four shoulder screws into the sides of the new media card reader and tighten them.
4. Attach the cable to the media card reader and system board connector.
5. Align the shoulder screws with the screw guides, and slide the media card reader into the bay until it clicks into place.