In the 5DS- 25/dash-zero and -dash-1 ZF manual (which is mostly a picture book, not a real overhaul manual), there's some illustrations. The diff case that also holds the ring gear inside looks different than the later one with friction discs, as only one end is removable rather than both ends unbolting.
But as I said, the tilting sprags (they look a little like steel beans) begin to wear instantly upon running the car and after a time, they no longer tilt correctly and provide locking. And there are practically no spares- the GT-40 guys all snatched them up. Indeed, most GT-40s today run the later clutch type LSD just because of no availability of the sprags and other parts.
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