Object (wall accessory) attached to wall

[ReignBough]

I am trying to create a wall accessory (subtype: Model Element > Building Element > Covering > Accessory > Wall (Accessory)) that is fixed to the wall. It will always be the same length as the wall. (Base length only. The object have A and B offset to extend its length.)

☑️When I move the wall, the objects move with the wall.

☑️When I resize the wall, the object also changes its size.

The problem now is that I can still move the object by itself. Is there a way to keep users from moving the object? Or better, move the parent/owner wall when the object was modified?

Thanks.