Connection device for a trailer coupling or a load bearer

The device has bolt component and mounting component supports provided as annular grooves (73, 83), which are adapted to a snap ring. The bolt component support and/or the mounting component support comprises depth. The ring does not stay in a clamping position before the supports. A bolt component (70a) is inserted into a connector base (81). The bolt component support is partially engaged in the mounting component support at a fastening position for a high tensile connection of a support component (80a) with the bolt component with respect to a connector axis.