Move object invertically to another

I want to close a drawer when another drawer is opened and vice versa. I'm only interested in the z-Axis Movement. My Script doesn't work so far. The other drawer doesn't move at all. The if-statement is called so myVelocity is more or less 0 when the drawer is moved.

     private Vector3 myVelocity;
     private Vector3 otherVelocity;
     public GameObject otherDrawer;
 
     void Update () {
         otherVelocity = otherDrawer.GetComponent<Rigidbody> ().velocity;
         myVelocity = GetComponent<Rigidbody> ().velocity;
 
         if (myVelocity.z > 0 || myVelocity.z < 0) {
             otherVelocity.z = myVelocity.z * -10f;
                 }
       }

I'm working with the HTC Vive.,I want to add an inverse force to an object if another respective object is moved. To be more precise a drawer should open up if another drawer is closed so I'm only interested in the z-axis movement. I'm using the HTC Vive.

This is my script so far but it doesn't work. The other drawer doesn't move at all. The if-statement is called so myVelocity.z is more or less 0 when I move it.

     private Vector3 myVelocity;
     private Vector3 otherVelocity;
     public GameObject otherDrawer;
     void Update () {
         otherVelocity = otherDrawer.GetComponent<Rigidbody> ().velocity;
         myVelocity = GetComponent<Rigidbody> ().velocity;

         if (myVelocity.z > 0 || myVelocity.z < 0) {
             otherVelocity.z = myVelocity.z * -10f;
 
         }