A first and second substrate, and electrically conductive first and second connection parts are provided in a method for establishing an electrically conductive connection between two substrates. The first connection part is mounted on the first substrate by a first releasable connection and the second connection part is respectively mounted on the second substrate by a releasable connection. An electrically conductive connection assembly containing the first connection part and the second connection part is established by either a cohesive connection between a connection portion of the first connection part and a connection portion of the second connection part or an electrically conductive crossmember provided and a cohesive connection of a first length portion of the crossmember to the connection portion of the first connection part and a second cohesive connection of a second length portion of the crossmember to the connection portion of the second connection part being established.