Curtain Clamp for Sliding Door Slot

I find sliding doors to be a pain because the closet is always only half open. A curtain works much better. Where you could just use a curtain rod, I like using the existing door channels. Tons of tapestries available on amazon that work great. Here's the one I chose.

https://www.amazon.com/gp/product/B01MQCI8HS/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1