The module (1) has a fixed parallelepiped frame (2) supporting a complementary electric connector (3) to form a portion of a connection terminal. Another electric connector is connected to a dispensing trolley. The former connector is fixed on a support (5) moving along vertical translation relative to the fixed frame for allowing engagement between the connectors. The support moves along horizontal translation with respect to the fixed frame. The support is mounted to slide on a vertical axle (7) i.e. cylindrical rod, integrated to the fixed frame.
