Abstract: The present invention provides an optional back connector assembly that is adapted for use with an elongated baseboard heating apparatus. The heating apparatus includes a removable knockout plate covering an aperture in the rear wall of the apparatus which plate when removed allows access through the aperture to a terminal section of the heating apparatus. The connector assembly comprises a bracket member having a mounting portion mounted to the rear wall within the terminal section below the aperture and a ramp supporting portion sloping upwardly and inwardly of the mounting portion to locate the ramp portion in proximity to the aperture. A clamping plate is further provided in the assembly which is operable for clamping between the ramp portion and the clamping plate at least one electrical power cable passing through the aperture into the terminal section. Lastly, the assembly includes a notched cover plate having at least one U-shaped notch along an edge surface of the cover plate.