CAPM on BTP Points to HANA DB On premise

I have a running CAPM application deployed on XSA on On premise HANA Database .

Question : I want to deploy this CAP application to Cloud Foundry in BTP , use its XSUAA but the DB must still be my on premise DB .

Can I do that ? if yes - how would I configure my hana service instance / user provided service in BTP ?

( in my on premise, after the application is deployed, I removed the DB service binding from the application and then tried to set the environment variable VCAP_SERVICES manually - System didn't obvioulsy let me do that )

Sreehari