not all have the cord it was a delete option.
look on the driver's side of the engine block just above the oil filter if you see a plug or a plug with a cap on it then you have the heater just no cord which can be purchased from ford. if there is a 3 stranded wire then the other end will have the plug.
Quite frequently they will be routed in odd ways from the factory.
BTW in SC you should not ever need your block heater if your glow plugs are working correctly.