According to the town of Enfield, Nova Scotia, it's in the town of Enfield. According to documentation published by the town of East Hants, NS, it's on the south side of the river across from the 'village of Enfield', where Ben Franklin's hired agent operated a 'Wayside Inn'; that would place it about here, but I can't find a primary source that gives exact deed lines.

However, regardless of where it was, William never made it to his holdings there. Benjamin Franklin passed on the title to the lands in 1790; William Franklin had left the United States for London eight years earlier in 1782, and never again crossed the ocean.