mine has two crosssed "sticks" (or dowels, or bars)
across the back which give it an anchor place, but
still sitting is the best. A player i accompanied
recently suggested the wooden supports be removed
to allow more flexible movement of the hand behind
the drum for more tonal diversity.

good luck..i can;t picture how or where a strap would
attach. Let us know what you find. And maybe the show
is available on web archive?? which one was it?