Allied Telesis AT-SBx81CFC960 - Manual (Page 202)

Chapter 9: Powering On the Chassis
202 Section II: Installing the Chassis
Figure 146. Connecting the Positive Lead Wire
5. Wrap the negative lead wire clockwise around the remaining terminal
screw and secure the screw and wire to the negative terminal
connection on the terminal block with a #3 Phillips-head screwdriver,
as shown in Figure 147 on page 203. The negative terminal is on the
right.