Nice reproduction of original part, which duplicates the factory wiring pigtail, bezel and knob. Connection plug has two female plugs and one male plug.
*A 1965 GT that came from the factory with fog lights would use this fog light switch assembly. If your Mustang does not have factory fog lights, then use FGS1. If you are still unsure, check the connector on your original fog light switch to make sure you have the correct connection plug. If you have two male and one female, use FGS1.