Coupling head assembly for a pneumatic and electrical connection of a trailer to a trailer vehicle

The coupling head assembly includes a pneumatic trailer coupling head and an electric trailer connector attached to the chassis of trailer. A pneumatic tractor-coupling head (6) and an electric traction vehicle terminal (7) are mounted to the chassis of towing vehicle (1) and are arranged opposite to the coupling head and the connector. A fastener is arranged on a common mounting plate (2) for fixing the pneumatic tractor-coupling head with the electric traction vehicle terminal and to the chassis of towing vehicle.