Have a crazy idea for adding weight past max dumbbells at planet fitness but not sure how to make it work?

So everyone knows at planet fitness the weights only go up to 75lbs.

I have this idea for adding weight by using wrist cuffs with a carabiner attachment and wrapping smaller weight plates around it(2.5/5lbs).

Going to try this but not sure if it will work. I would need some really longer carabiners to fit the radiu.

Any better way to do this?