Casting to Animation Blueprint

Hello, I am currently trying to figure out what to put as the wildcard for the ‘object’ reference on ‘Cast to (My Animation Blueprint)’.Since it’s not an actor I can’t do my usual thing of ‘get all actors of class’, so I’m a little stumped. I’ve been getting around this by casting to a different blueprint and accessing its variables within the animation blueprint, but this seems inefficient. Any help would be massively appreciated!

Can you give a pic?, it’s not quite clear…