Assembly for producing a windscreen-wiper system for a motor vehicle and connection device including such an assembly

The invention relates to an assembly (1) for the realization of a windshield wiping system (3) of a motor vehicle comprising a terminal piece (5) of a wiper blade arm (7) intended to move a wiper blade (9), a hydraulic and/or electrical connector (11) for supplying liquid to the wiper blade and/or for heating the liquid, said terminal piece (5) being configured to accommodate an adapter (13) allowing rotation between said arm (7) and the blade (9), said terminal piece (5) internally accommodating said connector (11), said terminal piece (5) being configured to engage said hydraulic and/or electrical connector (11), in an oriented manner relative to the terminal piece (5), in a position, called service position, authorizing the disconnection and/or connection of the connector (11) to the arm (7).