I ordered the kit; now I've worked on a drawing based on what I have inside the cover now, (power switch and thermostat) and the layout EB drew for me, and a slightly more
visual one for me. I'm not an electrician, but I can do simple things, and have swapped out lots of parts over a long career as a screenprinter. I usually get some advice from folks like us here, and then forge ahead. I'll post my finished drawing just to see if anyone catches something wrong...
Steve