Contura V Locking Switch Single Pole On-None-Off, Red Lock Button 12vdc Red Led

Contura V Locking Switch Single Pole On-None-Off, Red Lock Button, Locks UP,20A 12Vdc Rated, Red LED : LENS UP WHEN LIT: T3+ T7- Oval Window, Bucket and Padlock Symbol 10 Term Base ,No Gasket.

When the bottom of the switch is depressed, the switch is in the locked position, and the contact ( pins 2 and 3 ) is open circuit.

(The manufacturer would call this locking in the up position, the top of the actuator is raised)

When the lock mechansim is activated the Top of the switch may be pushed down, and the contacts become closed circuit.  

This means the attachment may then be unlocked.

If incoming feed is to pin 2, then upon switch closing ,power will be connected to pin 3, giving the opportunity to light the LED

to indictate the attchment may be released.