How to get the correct Osram OEM Ballast -D1/3 O3?

Osram OEM Ballast - O3 and O3B - These two OEM ballasts have same Parts Number:10R-034663. Look at the O3 and O3B Ballast picture below, which is same for the connector and hard to find out which one is correct one for your car.

How to find out the correct OEM Ballast for this item to your car? 

Please check the power supply connector from your car before you purchase. If the power supply connector from your car is with TWO Wires, O3 OEM Ballast will fit in your car. Please see the picture below. 

If the power supply connector from your car is with THREE Wires,  O3B would be correct one for your car. 

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