DMX Library - Cannot assign "Fixture Patch" dynamically from Blueprint to multiple DMX Fixtures.

I’m working on a scene with multiple lights and I’d need to assign the DMX “fixture Patch” parameter of my lights dynamically from a Blueprint.
For instance, I’d need to assign different fixture patches based on the light index but I can’t.
I’ve been diving into the the DMX Blueprint methods but the only thing that I found was a method to assign the DMX library but not the fixture, it has to be selected manually.

Did anybody face the same problem or knows how to proceed in this case?