There was a map published in one of our newsletters. Are you signed up as a member? For only $30 a year, you get the bi-monthly newsletter (which is the official source of information about the WW&F museum, as opposed to this forum.)
But, to answer your question, the centerpoint of the turntable will be in the existing parking lot, to the west of the shop building. Of course, we have to move the parking lot first. Before we build a parking lot, we need to construct the restrooms, etc.