Apple Power Macintosh 9600 - Manual (Page 99)

6 Set the cover panel aside.
To protect the metal shielding on the inside of the panel, lay down the panel
so that the metal shielding faces up.
7 Reconnect the power cord to the computer.
Connect the power cord to your computer and to an AC outlet. This helps
protect the computer from damage caused by electrostatic discharge.
Plug the power cord into the power socket.
(back of computer)
99 Installing PCI Expansion Cards and Additional Memory