setting up DNS to resolve correctly

I have installed cloudmin on a fresh server.
Currently I have a hosting running Cpanel that manages the DNS for my primary domain (e.g

I have created a new zone on my main server with Cpanel for
When creating VPS on cloudmin server, it creates a new subdomain, eg.
How to have this resolve correctly instead of going to my main server and add test1 to cloudmin zone?

Thank you