Allied Telesis AT-SBx81CFC960 - Manual (Page 194)

Chapter 9: Powering On the Chassis
194 Section II: Installing the Chassis
4. Using a #1 Phillips-head screwdriver, remove the two screws that
secure the plastic cover over the positive and negative terminals and
remove the plastic cover from the power supply, as shown in
Figure 136. You may need to lift the locking handle slightly to access
the bottom screw.
Figure 136. Removing the Plastic Cover
Note
The plastic cover is not used with the right angle terminals.
5. Use a #3 Phillips-head screwdriver to remove the two screws from the
positive and negative terminals, as shown in Figure 137 on page 195.