Abstract: A fastening assembly for attaching and accurate positioning of a first workpiece, which defines a first main axis, on a second workpiece, which defines a second main axis and includes an anchor secured on a supporting surface of the second workpiece. The fastening assembly comprises a first member including a fastening portion for holding the first workpiece; a second member including a receptacle for the anchor; and wherein the first member and the second member are movable relative to each other in order to move the fastening portion toward or away from the supporting surface of the second member.