Apple Power Macintosh 5400 series - Manual (Page 156)

To install a communication card, follow these steps:
1 Remove the plastic access cover from the vertical plate.
2 Remove the communication card from its static-proof bag.
Hold the card by its edges to avoid touching the connectors on the card.
3 Align the card with the communication card access hole.
The communication slot is the rightmost slot on the logic board as you face
the vertical plate.
Communication slot
Vertical plate
Hook
Communication
card access hole
Communication slot
Push the two plastic tabs apart and pull off the
metal retainer so the access cover can come off.
Vertical plate
Metal retainer
144 Appendix B