An electronic system that monitors a trailer hitch assembly having a plate hitch with a throat for receiving a kingpin of a trailer and a locking mechanism for locking the kingpin within the throat. The securing part and the support body are fixedly connected to each other indirectly or directly, and they cannot be detached from each other without being destroyed. The electrode support and the electrode, or electrodes, are constructed for direct insertion into body tissue, said insertion being channel forming. The code module is then served to the web server and installed. For registration of the signals received by a sensing element of a single-photon detector, time of arrival is recorded, optionally in conjunction with registration of time intervals. The grouping device is made of a first member for moving the plant matter toward the rear side of the machine and of a second member for moving the plant matter toward a side, the second moving member being mounted on a support in such a way that it can be moved closer to or away from the first moving member for forming a double windrow or a single windrow.