Each object has a "vehicle" property. Set object 1's vehicle to object 2 and then whenever you move object 2, object 1 will move as well;
But it wont work the other way round - if you move object 1, object 2 will not move with it.

Clicking the mouse here will make the ground move with the camera.
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I have mostly moved on from Alice, but may still respond to messages if important [¬º-°]¬