A pretty rudimentary diagram of the cord.
I didn't modify the original cord or wiring in any way -- I just plug the freezer into this just like my previous Ranco controller.
All three of these segments meet at the "back" of the keezer. #1 goes from the wall outlet to the back, #2 go from the love controller to the back (mine was routed inside the keezer) and #3 just dangles down to the original plug.
For my purposes #3 was a little two foot stub, #2 was just long enough to go from front to back after hooking up the controller and #1 was the rest of it (~8' in my case).
I'll see if I can find my wiring diagram -- it's on paper somewhere...