Glad you clarified that one, Maurice...
Jose, Kutai & Modang are quite different cultures. You'll note that the tip of the branch is carved conically to help in attaching (and arranging) the short hair decorating these tips (a bit like a brush). This won't work with the carving of most parapat/perepet prongs.
Since the prongs are pointing upwards, long hair would be quite awkward. There is a single example with long hair in our archives (in an example with missing prongs); I'd tend to believe that this was the result of an ill-informed restoration attempt though.
Regards,
Kai