Abstract: A device for selectively interconnecting a series of conductors comprises an insulative housing provided with a series of parallel passages through it each adapted to receive a conductive pin whose free end forms the male connection member and whose opposite end is connected to one of the conductors. The various pins all emerge at their free end on a common side of the housing. An insulative cover closes this side of the housing and is provided internally with a plurality of U-shape cross-section conductive bars forming female connection members each facing a plurality of the passages and adapted to cooperate with a plurality of pins by coming into contact with the emergent free ends thereof so as to short-circuit them electrically together.