I learned it by listening to a Mike Harding recording where he accompanied on 5-string banjo in a minor tuning, and including a very strident chord, which I have never been able to match up to any "real" chord in books of chord fingerings.
If you intend to use a banjo, I can let you have the interpretation which evolved from what I originally heard and which altered over the years to the form my playing now takes it to.
It might also be possible to organise an ear-to-ear meeting in the Paltalk Room sometime.
GtD