What Is It Side 1 View

Whit the inspection plate removed from the wing this is a side view of the electrical device.It is about 5/8 inch high. There is 4 small feet that are about 1/16 inch tall on the same side that the three screws that secures the device to the inspection plate. Note the two electrical wires that are soldered on and the third terminal is not connected. The device is about 1 inch long, 1/2 inch wide, and 5/8 inch tall. No visable stock numbers.