Creating multiple instances of a blueprint class and allowing a change to happen to individual instances without it affecting all of my instances?

Just duplicate this actor class as new class, or create a child blueprint from this class, and add additional functionality.

So I have a working switch and wall that the player can activate as seen here:

This is done in a blueprint class so I have a “Prefab” of sorts. Then I have this instance of my prefab here:

As you can see I need the switch to be on the other side of this wall for the player to use. SO, my question is, how can I single out individual instances of my Blueprint class to make alterations to it WITHOUT changing the rest of the instances in the scene? If possible please provide visual explanations to help understand what to do or if you know of a tutorial I missed leave a link.