Lew, It is obvious that when Davis went to the current “easy install” design they were not taking proper siting into consideration. They simply were making it as easy to install as possible for the majority of the people which equals more sales or so they surmised.
You do have a challenge in your situation. From the picture provided, I don’t see you have much choice other than to use a repeater and move instruments to the open field. That is if you want as ideal siting as possible.