What is the proper way to create tables without existing connector

[fuzolan]

I would like to ingest SAP structures. This would probably works best, if I could push my scheme to the open metadata rest api.
What is the best way to do it? Can I also ingest such schema per file, too?
Do I have to create a Dummy connection as a custom database first and push my schemes into that?

When there are other good ways for sap hana ingestion then please let me know.