I finally picked up some short 6-32 stainless steel screws so I drilled and tapped the 4 holes that will hold the pitot to the mast. I bought the shortest screws I had but on the narrow end of the pitot they interfered with one another. I ground down the screws until they worked. I then hooked up the pitot to some power and tested the pitot. I let it run for 30 min to see how far up the tube the pitot would migrate. My concern was that it would get too warm and melt the plastic hose. There was not heat at the AN fitting after 30 minutes so I am sure it will be fine. I also hooked up a test light to see if the white wire which is a pitot off or failed light, which worked just fine.
