Plug ONLY fits PARALLEL PARK ASSIST SENSORS , FR&FL Positions in the Sceme, See pics 2, 

 SENSORS ON THE SIDE OF THE CAR BY THE WHEEL ARCH (Nr 1 and 6 )  ON THE FRONT BUMPER.

Please note, the wire colour may be different to the ones you have, check the plug pin wire colours from the opposite sensor, (FR and FL) 

If you have any further questions please ask.