Hello, I believe the on-premise HANA is like the SAP CAL HANA system, I just gut this up and running because I could switch to Basic Auth: Accessing HANA XS OData in Web IDE and beyond
I think it could be possible to use the HANA Cloud Connector to get access to your on-premise system.
But for stuff like SAML/trust and other things I am not the expert and don't know.