Abstract: An electrical connection device includes a socket connector and at least one plug connector. The socket connector is mounted to a substrate and defines two or more receptacle chambers each selectively mating with a plug connector. Each receptacle chamber has a tongue plate with a plurality of terminals fixed thereon. A resilient arm having a projection at a free end thereof is formed in the receptacle chamber for engaging with a raised section of the corresponding plug connector thereby retaining the plug connector in the receptacle chamber. The plug connector defines a slot for receiving the tongue plate. A plurality of contacts is arranged in the slot for electrically engaging with the terminals fixed to the tongue plate of the corresponding receptacle chamber.