IBM Power System 9009-41A Manual page 150

Figure 131. Installing the service access cover
3. For a rack-mounted system, unlock the blue rail safety latches (A) as shown in Figure 132 on page
137 by pushing them inward.
Ensure that the cable management arms can move freely. Ensure that the cables at the rear of the
unit do not catch or bind as you push the unit into the operating position.
136 Power Systems: Power Systems: Control panel