The refrigerant is added through a low-pressure service port located on the A/C system. You'll typically find this port near the drier or accumulator, which is usually part of the A/C lines under the hood. The exact location varies slightly depending on the specific model and year, but it's usually fairly accessible once you locate the A/C components.
Crucially, adding refrigerant yourself is generally not recommended. Low refrigerant is often a symptom of a larger problem (leak). Improperly adding refrigerant can damage the system. You should take your vehicle to a qualified mechanic or A/C specialist for proper diagnosis and repair. They have the necessary equipment and expertise to safely and effectively service your A/C system.
