Allied Telesis AT-SBx31CFC960 - Manual (Page 192)

Chapter 9: Powering On the Chassis
192
Figure 132. Connecting the Positive (+) Power Wire with a Straight
Terminal
7. With a #3 Phillips-head screwdriver, connect the negative (-) power
lead wire to the negative terminal on the power supply, with the
remaining terminal screw removed in the previous step 5. The
negative terminal is on the right. You may attach the terminals with the
wires either above or below the terminal block. Refer to Figure 133 on
page 193.