While generally near the battery, the positive terminal is usually a large, clearly marked "+" post on the battery itself, or a sturdy metal stud nearby with a "+" marking. The negative (-) terminal might be another post on the battery marked "-", but often a ground point on the engine block or chassis (a sturdy, unpainted metal part) is recommended to avoid sparks near the battery.
Never connect jumper cables to any moving parts or fuel lines. Always ensure the car's ignition is off before connecting the cables. Incorrect connection can damage your car's electrical system. If you are unsure, it's best to consult a mechanic or roadside assistance.