Verify mongosync between two Atlas clusters using Migration Verifier

Hello,
We are trying to test data verification for mongosync between two Atlas clusters using the migration-verifier tool https://github.com/mongodb-labs/migration-verifier/tree/main . The page describes we can use config file but not sure what needs to be used in the “metaURI:” field.

srcURI: mongodb://localhost:28010
dstURI: mongodb://localhost:28011
metaURI: mongodb://localhost:28012

Any help here.
Thanks,