Is it possible to update the Service Fabric Cluster Manifest?

I found the following API

await fabricClient.ClusterManager.ProvisionFabricAsync(null, "testMani.xml");

but have not figured out where to store the new manifest.xml file?

using it as listed here it will throw exception that the file testMani.xml do not exist in the store.

How can one after deployment manipulate the cluster manifest.