How to connect the three wires of Wuling Light ACC switch?

This is a double control switch, so there are three interfaces. If you control lighting or electrical appliances alone, just connect two interfaces. First, you need to know the polarity and purpose of each power cord on the wall. Connect the live wire to the L interface of the switch, and connect the control lead of the lighting lamp or electric appliance to the L 1 interface. L2 is empty. Leave it alone.