You can use a System Component to be a member in another Systems as a Component.
Read more Systems Module - Definition
Select the System Component or Component that you would like to add as a component to another system
Select “Add to System”
Search for an existing Component or System Component that will be or is owner of the System.
Show Suggestions: Will base the search on previous used and classification
Search All Component: Will search for both Component and System Components
Search System Component: Will search for only System Components
Select Component or System Component that will be or is owner of the System.
Select System
Create new System
Use existing System (only available if you have selected a System Component that is owner of a system)
Select “Ok” and the Component has been added to a system.
If you selected a Component in step 4 the component has become a System Component in the overview. It will remain a component in the system it was already part of, but the properties will say that it is a System Component