Andy,
Thanks for all the pictures. That certainly helped. I am currently waiting for the proper piping kit just like yours for a cab tractor to get to my dealer. He had supplied me with a piping kit for an open station tractor. Now that I see where the couplers mount below the step, maybe I can determine how long the rubber lines need to be. How much slack do you need for hooking/unhooking? Do you know the length of your rubber hoses?
Jason