Hi Juvatwad,
This might help. First, stop thinking of the switch as ON/OFF. Think of it as circuit OPEN (no path to ground, engine runs) & CLOSED (path to ground shorts the magneto, engine stops). Then you can simplify things even more once the switch is installed by labeling the cowl or fuse with "RUN" and "STOP". That way you don't have to do the mental conversion and there is no confusion.