This image shows the Endpoints tab for the Employee business object. It displays 5 endpoints for the Employee and 5 for the referenced business object, Employee/departmentObject. 

If you clicked the Edit Endpoints button and selected the nested Location business object referenced by Department, Employee/departmentObject/locationObject, you would see 5 endpoints for the Location reference object. 

Above the endpoints is the Resource APIs and the Resource Cache Control nodes, which are not expanded.