IBM 9080-M9S Manual page 639

c) Label and unplug both service processor (FSP) cables (B) from the system node being serviced
using the pull tab (A) attached to the connector.
Figure 553. Removing the service processor cable from the system node
d) Label and unplug the UPIC cables for the system node that you are servicing, if applicable.
1) Remove the white plastic lock (A) from the plug housing as shown in the following figure.
System processor module 633