Visayan suspension

[Battara]

Let me take a stab. I think "A" would be thrust through a sash like they do in other parts of the Visayas.

You are right about the others - they would be tied on by a rope or rope like material through little slots/holes in the scabbards, like other parts of the Philippines.

Hope this helps and welcome to the world of collecting Philippine weaponry. Several of us also collect these.