Curtains for wedding arch

I am wanting to do the tie back curtain look for my wedding arch. I can't seem to find anywhere how you actually attach the fabric to the metal arch. All the videos I have seen is to make your own arch or just simple decorations to add onto it. All suggestions and ideas are welcome on how to actually attach the fabric to the metal arch itself. I'm planning to use satin fabric to do it with. Thank you ladies. I would add a photo of what I'm doing but can't figure out how to.