Using an actor blueprint to call function in another actor

I have a button blueprint that has a use function in it, and Im trying to figure out how I can set it up so I can use the button blueprint to call an action in another actor blueprint. When I press this button, I want to make a door open, but I dont want to use the level blueprint, and I want it to be modular, so I can have any blueprint actor with a use function in it be compatible with the button blueprint.

I was actually able to figure this out by creating a new variable of type actor reference, making it public, and then when placing down the button blueprint in the level, I used the little eye dropper beside the variable to select the door that I wanted to have open. I had to make a parent class for the door so I could cast to the parent, and get the function from that.