Apparatus and process for connecting an arbitrarily branched wire harness to a wire harness having certain wires, especially for connecting a trailer coupling cable

The device has a connecting box (16) connected between coupling system and taillight bundles (12, 14) and having addressable inputs (18). The box has input and output stages connected to conductors of the respective bundles. An addressing box (26) addresses the inputs to outputs of the output stage for configuring the inputs so as to allow the conductors of one bundle to correspond with the conductors of the other bundle. Independent claims are also included for the following: (A) a utilization of a device for connecting a coupling system bundle to a bundle of taillights of a motor vehicle (B) a method of connection of two conductor bundles.