An interchangeable connection module for electrically connecting an electrical switching unit to an electrical installation includes a connecting part and an actuation button. The button is translatably movable between a rest position and a pressed position in order to move a corresponding deformable elastic strip into a depressed position thereof when the module is connected with the unit and the button is moved into the pressed position thereof. The connection module includes a locking device that is capable of cooperating with a locking interface of the unit, it being possible to actuate this locking device with the button.