What is the round thing in the trunk light of the Bora called?

[McBeau]

The round thing in the trunk light of the Bora is called the vehicle towing point. Vehicle towing point: Towing a vehicle can be divided into soft towing, which uses a towing rope as the tool, and hard towing, which uses a sturdy towing frame as the tool. Regardless of the method used, before driving, it is necessary to establish communication methods and signals for starting, driving, turning, decelerating, stopping, and encountering special situations during towing (such as using the horn, lights, or mobile phones carried by the driver's companion to maintain contact). Towing precautions: During driving, both the driver of the towing vehicle and the towed vehicle should start at low speed, shift gears smoothly, drive slowly, turn appropriately, and brake moderately. Both the front and rear vehicles should turn on their width indicator lights while driving. The speed should not fluctuate suddenly; maintain a balanced speed and appropriate gear shifts, especially for the towed vehicle, which should control its speed to match the towing vehicle and position itself slightly to the left of the towing vehicle.