A mirror assembly system for use in automotive vehicles is provided. In one embodiment of the presented invention, a first connecting member has the form of a tubular flange member, with a first contact surface and a first groove being provided inside the flange member. A second connecting member is adapted to be introduced with play into the tubular flange member, with the second connecting member comprising a base body. On the base body a first retaining boss for engagement in the first groove and a guide surface arranged behind the retaining boss are provided, with the guide surface being associated to the first contact surface. A clamping device passes through the flange member and, when actuated, presses against a first pressure surface on the base body so that the inclined guide surface presses against the first contact surface, to thus jam the mounting member inside the flange member.