An attachment system for attaching an electric cable to a window pane. The system includes a generally elongated plate having a width approximately equal to a thickness of said pane, the plate being provided with a plurality of holes. A socket is fastened to the plate and is shaped and sized to receive a portion of the electric cable within it, the socket being in communication with an opening provided in the plate in order to permit electrical conductors to pass through the plate. The electric cable is fastened to the plate and the plate is fastened to an edge of the pane, in order to resist a 35 lb traction.