help with brass knuckle belt buckle?

I've seen brass knuckle belt buckles on websites and such, but I would never pay for one. Some recently appeared in my house, so I thought I might make them into a belt buckle. I'm just not sure how to go about doing this. I don't want to mess it up, and I want it to look nice, so I imagine whatever I do to it will need to be permanent (gluing, drilling holes, etc).
Does anyone know an easy way to go about doing this?

Thank you for any help. I'll post pictures later if I figure something out.

 

The easiest way I can think of ....would be to make a D ring out of heavy guage wire and drill two holes for this to attache to the brass knuckles.This is where the belt would attach.Then drill a hole to attach a peg or stud,and this would be the catch for the belt.I don't have any type of pics to show ya....and my drawing skills really suck.So hopefully you can envision what I told you.It is really a very simple task to make something into a belt buckle.I hope I have been of some help.