Then promote the sound to a variable, make it instance editable and click the eye icon next to the variable so that it is open.
Then everywhere where you need to play the sound inside of that blueprint, hook up the variable with the sound effect
You should now be able to swap out the sound effect on a per instance basis by click on the blueprint inside of the editor / outliner and in the details panel chose the sound effect you need by setting the variable you made of the sound effect.