We have an old Chormalox electric baseboard heater (Model BR 81), 99 inches long in our family room that we want to replace. However, I am having trouble figuring out how to access the wiring so that I can remove the heater. The front cover does not seem to be removable and there is no separate access panel to the wiring box from the front or side of the heater. The wiring is on the right side of the heater. I am unable to determine if I should simply remove the screws holding the heater on the wall and then try to disconnect the wiring from the back of the heater. Your help would be greatly appreciated.