If the shot is from the player blueprint then on the widget you can do Get Owning Player Pawn and from that you cast it to the type of your player blueprint, from there you should be able to access the Save Level variable.
If the shot is from the player blueprint then on the widget you can do Get Owning Player Pawn and from that you cast it to the type of your player blueprint, from there you should be able to access the Save Level variable.