Apple Power Macintosh 7100/80AV - Manual (Page 107)

Upgrades Power Macintosh Upgrade - 18
10 Reinstall the power
supply in the drive
chassis. Press down on
the power supply until it
snaps into place.
11 Replace the power
supply screw at the
rear panel.
Note:
An extra power
supply screw is provided
in the upgrade kit.
Screw
Rear Panel Power Supply