Editor Utility Widget - Casting/Accessing variables from an Actor Blueprint

I’m trying to call a Sound Wave variable which I have stored in an Editor Utility Widget from an Actor Blueprint. Does anyone know how to approach this?

For context:
I am experimenting with building an EUW which allows a user to specify a Sound Wave asset which they’d like to be triggered by an Actor Blueprint.

Thanks

(UE4-25)

I would also like to know how to do this. I’m using UE5.1 myself, but any direction is good.