Additional image of the Hauler as recorded by the sonar crew today; great detail in the shadow of this image showing roof line, windows and open bow. 

If you look closely at the top down view of the wreck you can see a rectangular opening in the mid ship. I dropped into this hole on the dive mentioned in the first post about the Hauler but I was focused toward the bow.  Divers on the wreck today discovered that entrance leads to a lower room back toward the stern complete with sink and mirror.