Abstract: The invention relates to a method for producing an electrical connection of sub-assemblies and modules to a current supply device, which is provided with electric contact elements and magnetic bodies. According to said method, magnetic bodies of a consumer, which is provided with electric counter-contacts, are arranged opposite the magnetic bodies of the current supply device with opposing poles. In a first step, a mechanical connection is made using an approximate guide mechanism and in a second step, electrical contact is made between the contact elements and the counter-contacts using a precise guide mechanism in an automatic manner by means of the magnetic bodies of the current supply unit and the consumer.