IBM 9080-M9S Manual page 426

Figure 363. Removing the UPIC cable from the system control unit
6. At the rear of the system, put the cable management bracket in the service position as shown in the
following figure.
a) Pull out the quarter-turn fasteners (B) and turn them to disengage them while you lift the cable
management bracket (A) to its raised position.
b) Turn the quarter-turn fasteners (B) to engage and lock the bracket into position.
420 Power Systems: Removing and replacing parts in the 9080-M9S system