1. Disconnect all power sources (AC and DC). Cut the opening of the installation position using the provided template 2.Connect the green wire to one end of the float switch and the other end to the positive end of the pump. Connect the brown wire to the positive end of the pump 3. Connect the blue wire to the negative end of the pump. Connect the positive wire red to the DC power supply battery, and the negative feeder black to the DC negative (battery or bus) 4. Switch panel with self tapping screw. Reconnect all AC and DC power supply, open and close all branch circuits, and check whether the panel is working properly. 5.When the switch is in the manual position (MAN), the MAN LENS on the switch will emit light, indicating that oump is running. Pumps can work properly regardless of whether there is water or not (please use with caution) When the switch is in the automatic position, the automatic lens on the switch will glow. If the water level is higher than the float switch, the pump will automatically emit a "" sound, and the human lens will light up. Item name: Bottom Pump Switch Panel Circuit protection: 20A reset circuit breaker Rate: DC12V 20A/24V 10A Panel depth: 7.5Cm Installation Size: 10.3 x 4.3CM Waterproof grade: IP66 size:5.4 x 4.8 x 11.4CM Material:plastic colour:black Package Contents: 1 x Panel 4 x Screw 1 x Stickers 1 x Instructions Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.