Apple Macintosh Performa 5400 Series - Manual (Page 130)

10 Insert the retainer clamp back into the hole and hold it there while you screw it into place.
11 If you have a communication card to install, go to the next section. If you are finished
installing items in your computer, proceed to the section “Closing the Computer,” later
in this appendix.
Vertical plate
Screw the retainer
clamp in place.
Replace the retainer clamp.
Vertical plate
129 Installing an Expansion Card