The invention concerns a metal clip (1) for electrically connecting a conductive wire to a planar metal element, the metal clip having an S-shaped cross-section and being composed of three wings (2a, 2b, 2c), a first wing (2a) and a second wing (2b) defining a first longitudinal recess (3a) allowing the metal clip to be attached to an edge of the planar metal element, the second wing (2b) and the third wing (2c) defining a second longitudinal recess (3b). The second recess (3b) is provided with connection means (5, 6) for receiving the end of the conductive wire and for maintaining electrical contact between the conductive wire and the metal clip.