Help - Tail dress but no hook, how?

[Moses]

I've noticed some plugs that seem to have two belly hooks and a tail hook. But upon a closer look, it seems that the tail is simply some feathers/nylon wrapped on a split ring?

Does anyone have a close up picture of this? I have tied some nylon & flash on a siwash hook but don't quite understand how ones ties this to a split ring? Or perhaps I missing something here. Can anyone help please?

Thanks.