How to differenciate a copied BP on a Widget BP ?

Hello Guys,

I have done a BP that constains 2 meshs and calls a widget. In that widget i have 2 buttons that change the visiblity of which mesh in game.
My problem is that when I copy that BP (and change the mesh inside it) and try to do the same thing with another mesh in the level, the buttons refers only to the first BP that I created, so my question is, how to differenciate which BP the widget is called by?

First BP:


Second BP:

BP of the meshs:


Widget: