The contacting defines in the VEC the relation of a terminal, a wire, a seal and a cavity in a connector on the harness side. The coupling / mating can be used to connect the harness side to another harness (in the case of an inliner) or to an ECU. The figure above shows a simplified example of the connection between an ECU (highlighted in orange) and a wiring connection (highlighted in blue). The MatingPoint simply connects the two TerminalRoles on each side. This method is used for example in a wiring definition, where the concrete connector is not yet known.
For this reason this example omits the geometric aspects of a coupling (connector housing, slots, cavities).