Component References
You can assign component references to one component or to all top-level components in an assembly.
In the Component References dialog box, you can assign component references to top-level components in an assembly. To open the dialog box, right-click the assembly name in the FeatureManager design tree and click Edit Component References.
In the Component Properties dialog box, you can assign a different value for Component Reference for each instance of a component in an assembly.
For example, you can use Component Reference to store the reference designators for an electrical harness or printed circuit board assembly. When different instances of the same component have different values for Component Reference, you can show the instances as separate line items in a BOM. In drawings, you can also link the value of a component reference to the text of a balloon.