The invention is characterised in that the device comprises a first (120), a second (130) and a third (110) elongated element; a first moving unit (140), pivotally connected to a first end of the first elongated element; a second moving unit (150), pivotally connected to a first end of the second elongated element; a cable connecting unit (160), pivotally connected to a second end of the first elongated element and to a second end of the second elongated element; and a control unit (170), in that the third elongated element is arranged to be fixedly mounted at a parking space, in that both moving units are arranged to be controlled by the control unit to be displaced in either direction along the third elongated element, in that such displacement causes the cable connecting unit to be displaced in relation to the third elongated element, and in that the cable connecting unit is arranged to connect the cable to the vehicle by pressing a connecting means (162) against a corresponding connector of the vehicle.