The invention relates to a female element (2) that comprises at least one terminal conduction component and a receptacle (20) for receiving a body (10) of a male element (1) along a longitudinal direction (X2-X′2). The female element (2) has a proximal portion (210) fitted to receive an electric power cable (C2). The receptacle (20) includes a guiding chamber (205) for said body (10) in translation along said longitudinal direction (X2-X′2), and at least one guiding edge for guiding said body (10) revolving around an axis (X1-X′1) of said body (10), the one or each guiding edge being disposed, along said longitudinal direction (X2-X′2), between said guiding chamber (205) and the one or each terminal component. The guiding chamber (205) has a cylindrical form with a circular base circumscribed on a triangular base of the body (10) of the male element (1).