According to FIG. 8 the first work step is to slide an adapter 5 onto an exposed end 11 of the electrical conductor 1. The insulation 2 is stripped from this exposed end 11. As shown above, the sealing tip, which is not visible in FIG. 8, is seated on the transition between the insulation 2 and the electrical conductor 1.

Subsequently, according to FIG. 9, the exposed end 11 of the conductor 1 is placed onto a contact plate 10. The exposed end 11 is flattened and electrically conductively connected to the contact plate 10 at a weld 14. This is accomplished with an ultrasonic welding process.

In the next step, corresponding to FIG. 10, a flat conductor 3 is placed with its exposed area 13, which is not enclosed by a jacket 4, onto the contact plate 10. As explained above, the contact plate 10 is tiered to precisely fit a thickness of the flat conductor 3. The transition described here between the flat conductor 3 and the contact plate 10 is also securely electrically connected by ultrasonic welding.