JavaFX - MVC Pattern implementation

I am developing software for a software engineering course and I want to use the MVC pattern. JavaFX allows you to assign a controller to an FXML file to manage logic, but in our analysis diagrams, a single use case is managed by a single controller which is binded to different Boundary classes (view). In my project different windows are different fxml files, so I was wondering, how can I follow the MVC pattern by creating one single general controller that can manage to implement the logic behind a use case?

My problem is exactly the one shown here but this user has not received an actual response.

Thanks in advance!