Allied Telesis AT-SBx81CFC960 - Manual (Page 196)

Chapter 9: Powering On the Chassis
196 Section II: Installing the Chassis
Figure 138. 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 139 on page 197.
Allied Telesis recommends tightening the screw to 30 to 40 inch-lbs.