Control module comprising - a unit able to accept a first device that may notably be a printed circuit, - a façade intended to be placed against the unit, the façade being able to accept a second device that may notably be a load sensor, - a connection tie connecting the first device to the second device, the control module additionally being provided with an in-built assembly-aid device that holds the control module in an open state, the unit and the façade being some distance away from one another in a first position, the purpose of this being, amongst other things, to make it easier for the connection tie to be assembled, the in-built assembly-aid device then allowing the control module to be placed in a closed state, the façade and the unit having been brought closer to one another and being against one another, characterized in that the in-built assembly-aid device is a hinge comprising a portal frame secured to the façade or, respectively, to the unit, the portal frame comprising a pin fixed between a first support and a second support, the hinge also comprising an arm secured to the unit or, respectively, to the façade, the arm ending in an open hook that can be engaged over the pin so as to pivot around and slide along the pin, and in which the space under the portal frame, between the supports (42, 44), the pin and the façade or, respectively, the unit, which space is left free so as to allow the passage of the hook during the transition from the open state to the closed state, forms a square bracket having a first slot situated just beneath the pin and a second slot extending the first and running alongside the second support. - a unit able to accept a first device that may notably be a printed circuit, - a façade intended to be placed against the unit, the façade being able to accept a second device that may notably be a load sensor, - a connection tie connecting the first device to the second device, the control module additionally being provided with an in-built assembly-aid device that holds the control module in an open state, the unit and the façade being some distance away from one another in a first position, the purpose of this being, amongst other things, to make it easier for the connection tie to be assembled, the in-built assembly-aid device then allowing the control module to be placed in a closed state, the façade and the unit having been brought closer to one another and being against one another, characterized in that the in-built assembly-aid device is a hinge comprising a portal frame secured to the façade or, respectively, to the unit, the portal frame comprising a pin fixed between a first support and a second support, the hinge also comprising an arm secured to the unit or, respectively, to the façade, the arm ending in an open hook that can be engaged over the pin so as to pivot around and slide along the pin, and in which the space under the portal frame, between the supports (42, 44), the pin and the façade or, respectively, the unit, which space is left free so as to allow the passage of the hook during the transition from the open state to the closed state, forms a square bracket having a first slot situated just beneath the pin and a second slot extending the first and running alongside the second support.