Any advice or help appreciated. As far as I know the wires to use are BROWN and BROWN/WHITE and tape up the BROWN/RED. How do I connect the wires to the new two pronged switch from the old three pronged switch. I have the new switch but no new plug. Do I need a different plug? Do I change the bottom or top switch on the rad? The job looks a bit tight too so PLEASE help if you can.