Reference PostProcess Blendable in Blueprint


How do I reference a MIC I have plugged into the blendable slot of a post process volume? There is a scalar parameter that I would like to control inside a blueprint but I could not figure out how to reference the material.

Help is always appreciated, thanks.

The scalar parameter I mentioned above controls desaturation within the material, but I came to realize that the PostProcessVolume already has an option for this in the Film Component. How do I control this value inside a blueprint?