Emergency Switch?

Anyone know about an emergency ignition switch on these cars? Sorry I don't have a picture. But my '74 Duster has this box with a red button on it. It's in the rear of the engine bay near the ballast resistor and ECU. I have been told it is used to start the car if thre is an emergency. There appears to be no writing on it. I'm afraid to mess with it thinking it probably hasn't been used in a very long time.

Any info on this is appreciated. Thank
Author: admin