Jim writes from Oregon: I am working to get my 1965 Plymouth Satellite back on the road in 2017.
Currently I am installing the heater control switch. A fellow 1965 Plymouth owner helped me out by pointing out that "the cable attaches to the heater valve.
The attachment spot is located on the driver's side of the heater box near the top. Near where the 5/8 inch hoses go through the firewall. You'll need that flat attachment washer to hold it there."
See circled area in above photo.
The cable housing clips to the bracket to the right. I think there also is a
speed nut pushed on the cable attachment to keep the loop from coming off. -- Mike L. photo and comment.
March 1, 2017