Move a Rigidbody in a fixed joint without affecting the other

Hello,

I think this is a very common question but I do not find any answer.

I have a mass attached to another by a fixed joint.
The mass simulates a load cargo attached to a vehicle.

By design, It has to be possible to move the cargo. I have been trying to move it modifying the anchors, but it makes weird behaviours.

I have seen target position, but I not able to make it works. And I have tried to do it with JointDriveMode, but it says:

Code (CSharp):

1.     //
2.     // Summary:
3.     //     ///
4.     //     The ConfigurableJoint attempts to attain position / velocity targets based on
5.     //     this flag.
6.     //     ///
7.     [Flags]
8.     [Obsolete("JointDriveMode is no longer supported")]

So, if JointDriveMode is obsolete, what it is the accepted/right way to move a rigibbody attached to another by a joint?

Regards

 

I answer my own question for other with the same problem.

Moving the anchors works fine, but you have to move the transform before:

Code (CSharp):

1.         public void SetLocalPosition(Vector3 localPosition)
2.         {
3.             transform.localPosition = localPosition; //DO THIS
4.             joint.connectedAnchor = localPosition;
5.        }