I guess by calling it Les Kinney's contention, I mean the more broad theory that this photo is of AE and FN. Like many conspiracy theories, supporters take something simple, like a blurry photo, then start conjuring up other "evidence" to help make it true. But Les is the father of this Jaluit photo theory, so I attributed it in entirety to him.
The 1936 (really more like 1940) dock, like all of the Japanese fortifications at Jabor and Emidj, was concrete. It was photographed during the war, damaged by bombing, then photographed just after the war. (see attached photos)
The dock in the photo was actually a jetty, constructed of coral boulders, coral slabs (see the left and right "curbs" of the dock in the 1935 photo), with a coral sand surface.
If they were smart, they would have claimed the dock was built in 1940, so the one in the photo could have been from 1937 (other evidence notwithstanding), but they have instead hitched their horse to 1936.