Allied Telesis AT-SBx31CFC960 - Manual (Page 191)

SwitchBlade x3112 Chassis Switch and AT-SBx31CFC960 Card Installation Guide
191
Figure 131. 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. You may attach the terminals with the wires either above or
below the terminal block. Figure 132 on page 192 shows the wires
above the terminal block.
Allied Telesis recommends tightening the screw to 30 to 40 inch-lbs.