Askare over shoulder

I have seen many use their Askare wearing it over their shoulder, but I am not quite sure what mods I need if I get one for that.

Some say they use a Griffin Mod for this and some G Hooks, others some other things that I don't quite know.

Does anyone have a list of things I have to get to make that work?

The goal is just a shoulder bag for hunting without spending double what the Askare already costs.