How to access destination in consumer subaccount from mta.yaml file?

In my mta.yaml record of SAP CAP Multi-tenant application, I americium utilizing destination of SAP DMS arsenic dms-api arsenic shown successful the attached screenshot. This destination I person created successful supplier sub-account. How to devour this destination successful user sub-account? And, if I privation to adhd caller SAP DMS destination successful user sub-account past however to adhd it successful mta.yaml file?

I americium utilizing appRouter, successful xs-app.json record I person added dms-api nether routes