Electrical connection passing through a dividing wall

A method for manufacturing an electrical connection passing through a dividing wall, comprising the following steps:

• Manufacture of a flat part punched from metal plate having a base piece and a contact piece connected to the base piece via a connecting piece, wherein the base piece and the contact piece have approximately matching perimeter shapes, and a contact lug projects from a perimeter area of the base piece,
• Punching out of at least one spring tongue from the contact piece, and bending of the spring tongue out from the contact piece,
• Bending of the contact lug out of the base piece in the same direction as the spring tongue,
• Arranging base piece and contact plate above each other by bending the connecting piece through about 180° in such a way that the spring tongue projects on one side and the contact lug on the other.
• Introduction of the plate part formed in such a way into an injection molding tool in such a way that only the perimeter edges of base piece and contact piece and the bent-over connecting piece project sealed into a die cavity corresponding to the dividing wall, wherein the bent contact lug is located in a recess of the injection molding,
• Injection molding of the dividing wall, and
• Removal of the dividing wall from the injection molding tool together with the plate part held in the dividing wall at its perimeter edges and by the connecting piece.