how to shift center point (Period point) in my unity this is disable? how to fix?

how to shift center point (Period point) in my unity this is disable?

how to fix?

4151221--365836--meter sec.JPG

use Center of Mass if you can use a Riogidbody, or

put your Speedo object which is off centered inside an empty game object… that will be the easiest solution

public class CenterOfMass : MonoBehaviour
{
    public Vector3 com;
    public Rigidbody rb;

    void Start()
    {
        rb = GetComponent<Rigidbody>();
        rb.centerOfMass = com;
    }
}