Kinect programming question (labview)

I have a question on kinect programming. We are using labview, and want to program the kinect so that when “Right leg forward”, the robot shoot the ball. According to the manual, “Right leg forward” is Button 5. My question is do we need to open another joystick (addition to the “Left Arm” and “Right Arm” joystick in the sample code) for that? If yes, should the joystickDevice be Kinect 1 or Kinect 2?

You only open Kinect 1 once.
Then just take the buttons output from the Joystick Get.

The buttons are duplicated on each Kinect 1 and Kinect 2, so button 5 on each will react the same to a leg forward.