What does this switch activate?

The car has no fender tag (removed prior to purchase), but has matching motor numbers and VIN numbers, the transmission has been changed(not by me) to a 904 with a manual reverse shift kit, it has a console shifter that may or may not be original (I haven't removed it yet to see everything). I purchased it from a family that raced other cars in Georgia. I was told that it was not raced but they were not the original owners either. When I bought it it had a 500 cfm holley 2 barrell on it, and edelbrock LD340 intake, and headers. There is no power at the wires, the white wire dead ends in a factory looking male connector, I haven't completely traced the purple wire, also the connector to the switch appears factory?