Apple Power Macintosh 9600 - Manual (Page 119)

2 Lift up the computer so that it sits upright.
You are now finished with the installation. You may reconnect the cables and
power cord you disconnected from your computer, turn on the computer, and
start using the equipment you installed.
If you need help reconnecting your cables, see Chapter 1, “Setting Up Your
Computer.”
WARNING Never turn on your computer unless all of its internal and
external parts are in place. Operating the computer with the cover panel
off or when it is missing parts can be dangerous, and can damage your
computer.
119 Installing PCI Expansion Cards and Additional Memory