The circuit (10) has a device (6, 3) which has a base element (6) and a movable element (3). The base (6) is rigidly connected to the circuit (10). The movable element (3) has apertures to receive the plug connectors (1, 2).The movable element (3) can be guided from a rear position relative to the circuit (10) to a position in front of the circuit (10).
