Now, in a concluding step, the junction is sealed by overmolding 7. This step is accomplished with an injection-molding tool into which the previously produced connection is placed. The resulting cavity between the connection and the walls of the injection-molding tool is dimensioned to permit only as much material as is necessary to produce the overmolding 7 to be applied onto the surfaces provided for this purpose. The surfaces provided are the exposed conductor portions, i.e. the exposed end 11 of the electrical conductor 1, the contact plate 10 and the exposed area 13 of the flat conductor 3. However, the overmolding 7 also covers additional portions of the jacket 4 of the flat conductor 3 and portions of the adapter 5, but according to FIG. 11 only up to the cap 8 of the adapter 5 or alternatively up to the limiting bead in an adapter according to FIGS. 3 and 4. In FIG. 11, in a departure from FIGS. 8 to 10, the second adapter embodiment is shown with a cap 8 to demonstrate that the overmolding 7 should not reach as far as cap 8 in order to prevent damage to the inside gasket by the influx of heat. In both variants of the adapter, the overmolding 7 should only enclose that portion of the adapter that does not contain the gasket.

The sealing is enhanced during the injection molding of the overmolding 7 in that the injection pressure of the material of the overmolding 7 presses the adapter 5 firmly against the insulation 2 of the electrical conductor 1. That is the first step of the sealing. Thus, no material from the overmolding 7 will flow into the adapter during the overmolding process.