Good question, Martin ...
I wonder if it's connected like the holster on the police figure?
All the best,
Richard
LHAAP's link shows that it is, good call! That's actually a much more sensible place for a quiver to be, where you can easily reach for fresh arrows.
The only problem is that children tend to break these off, as some eBayed figures show. Not aproblem for careful adult owners though.
I see the figure's robes also project forward more than the regular skirted legs.