If you have ucmdb Java client in your local, you can create relationships from it
Steps to create relationship between two CI Types
Navigate to CI Type Manager
Select two CI Types(Test1 and Test2) to which you want to create relationships
Right Click and click on Add/Remove Relationship, then it will popup a sub window for relationships creation
In the popup box, check mark the box for the relationship types that you want to create (for example: composition/dependency/containment, etc)