The tailgate of the car is the tailgate of the trunk. That's the circle under the trunk. In general, the original back plate and frame are not integrated, but also welded. The backboard belongs to the body panel and will not depreciate too much after replacement.
The backboard is composed of several pieces, not a whole. The deformation of the spare tire floor or the deformation of the rear fender has little influence on the car, such as the handling performance of the car. So if the backboard is damaged, it can be repaired with sheet metal, and try not to cut it. Once cut, it is an accident car.