General Actor Blueprint communication to specific Scene Actor Blueprint

I have created an actor Blueprint in my Content Browser (e.x. a Car Blueprint). This blueprint is being created dynamically and added to my level as the game is running. At first there are no instances inside the level.

In addition i have a second actor Blueprint which is unique (e.x. Car Manager), but it is added in my level from the beginning of the game. Now i want to be able to access the functions of the Car Manager, from all the dynamic instances of the Car Blueprint.

My question is: Is there a way to do this? Because from the YouTube tutorials i could not find a specific way of doing this.