Allied Telesis AT-SBx81CFC960 - Manual (Page 198)

Chapter 9: Powering On the Chassis
198 Section II: Installing the Chassis
Figure 142. Connecting the Positive (+) Power Wire with a Right Angle
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 step 5. The negative terminal is
on the right. Refer to Figure 143 on page 199.
Allied Telesis recommends tightening the screw to 30 to 40 inch-lbs.