Allied Telesis AT-SBx31CFC960 - Manual (Page 198)

Chapter 9: Powering On the Chassis
198
Figure 139. Removing the Terminal Screws
6. With a #3 Phillips-head screwdriver, connect the positive (+) power
lead wire to the positive terminal on the power supply, with one of the
terminal screws removed in the previous step. The positive terminal is
on the left. Refer to Figure 140 on page 199.
Allied Telesis recommends tightening the screws to 30 to 40 inch-lbs.