Since the heater used Low Pressure propane, I tied into the feed to the Motorhome range using a tee fitting.
I then ran the tubing down along the drawers below the range, and drilled an exit hole between the drawers and the refrigerator. I had purchased a shutoff valve and a quick-connect designed for propane from Herb's Hardware, and these were installed at the end of the tubing.
Here is a closeup of the valve and quick connect.
Here's a picture of the heater hooked up and in the normal place that we used it while parked.
While traveling, the hose is disconnected, valve is closed, and the heater is pushed up against the couch with the heater legs underneath the couch to keep it from tipping over. Because dust is bad for the catalytic pad, we keep a cover on it while traveling and when stored for the summer.