Apple PC Compatibility Card (Installation) - Manual (Page 61)

Installing the card
1 Unscrew the retainer clamp screw from the front of the vertical plate, while holding in
place the clamp on the back.
Avoid letting the retainer clamp fall onto the logic board.
2 Lift out the retainer clamp and set it aside.
You’ll need the retainer clamp later, after you install the card.
Vertical plate
Remove the retainer clamp.
While holding
the retainer clamp
in place, remove the
screw that secures
the clamp to the
vertical plate.
Vertical plate
61 Installing the PC Compatibility Card in a Modular Desktop Macintosh Computer