Concept translation: the Dutch text prevails.
First look at the indicator on the coupling (koppeling), if it has one. Then lower the jockey wheel (neuswiel) until it pushes the drawbar (dissel) up: if the back of the car rises with it, the coupling sits firmly around the ball (kogel). Then wind the jockey wheel all the way in.
From practice. A working method from lessons and practice. It is not a rule of the law or of CBR.