To be absolutely sure, you should:
* Consult your owner's manual: This is the best source for specific information about your vehicle.
* Look for a diagram under the hood: Many vehicles have diagrams showing the location of major components, including AC ports.
* Use a reliable online parts diagram: Websites selling auto parts often have detailed diagrams showing component locations. You'll need your VIN to ensure accuracy.
Remember that working with refrigerant requires proper safety precautions and specialized tools. If you're not comfortable with this task, it's best to take your car to a qualified mechanic.