Allied Telesis AT-SBx31CFC960 - Manual (Page 199)

SwitchBlade x3112 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
199
Figure 140. 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 141 on page 200.
Allied Telesis recommends tightening the screw to 30 to 40 inch-lbs.