IBM 9080-M9S Manual page 346

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 291. 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.
340 Power Systems: Removing and replacing parts in the 9080-M9S system