Collegue found this system between the tractor and the trailer on the hitch of a truck that transports trucks. Asking the driver he only told us it was a brake then he had to go. Truck is made by LOHR Industries and didn't found any patent or nothing even after asking ChatGPT. Could you please help us find a utility or a meaning for this system ? And if it even has a point ?

(Sorry for bad English not native language, if you have any question be pleased to ask in the comments)