I'm trying to understand what you exactly want. So when the player clicks on the
Area2Ds, the turret will turn? When they click on "UpArea", the turret turns upward? You want the player's input to affect the turret in this fashion? Is this correct?
If that's the case, you can use a signal to connect the
Area2D to the turret's node.
Btw, how is this question different from the question you asked yesterday? If this is a continuation of that question, then please restrict it to that thread.