How to Install a Ball Probe - Hexagon

Arm without the Ball Probe - 

1- Flip up and turn the thin metal piece to the right 180 degrees.

2- Line up the shape on the ball probe to the shape on the arm

3- Twist the silver latch to the left HARD 180 degrees until it is back in its original position (Make sure the shapes are lined up correctly before twisting the latch)

4- Flip the latch back down, and the arm is now equipped to use the ball probe!