IBM 9306 Hardware Maintenance Manual page 136

to attach the console switch to the side braces.
Continue with the rest of the procedure to cable your console switch.
Note: Refer to the Apex User Guide CD for additional information if you are
configuring a tiered installation.
4. Verify that the power switch on the rear of the console switch is in the Off
position before connecting any cables.
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Hardware Maintenance Manual: IBM PC Server/Enterprise Racks Types 9306, 9308