Context
      
      In an assembly, you can define the relative position of components using the following
        constraints: contact, offset, coincidence, and angle constraints. Constraints are used to
        restrict motion along one or several of the six degrees of freedom. 
      You need to create a least one constraint to specify the position of the component. If a
        CATProduct instance is constrained by at least one MCX, a Connections
          of node appears under the CATProduct instance.

In this example, the part in a green frame includes at least one MCX, and the part in a
        red frame is not constrained.
      To determine a specific position for a component, you can either:
          - Create and apply a position constraint on all six degrees of freedom.
- Fix the component.