All the switches have 3 terminals, the bronze colour connects the internal light Panel mount diameter: 20mm Overall dimensions: 30 x 23mm (Height x Diameter) Switch Rating: 20A 12V DC Light Rating: 5-16V DC
How to connect? Check the second picture for diagram Basically the "silver" pins are the contactor (positive (+) wire) and the brass pin goes to minus (-) to supply the internal light with power, when contactor is switched