Windows Client to multiple Jenkins servers?

I have a perfectly fine Jenkins farm with a Windows server and multiple Windows nodes. Current Windows nodes are running as a service using shared secret.

I have just stood up a RHEL box with Jenkins that I intend to use as the server with all the builds to run on the Windows nodes (plus convert the current Windows server to a node).

While I am testing and setting things up I’d like to setup some of the existing Windows nodes to be available for both the RHEL and Windows servers. Is this possible? Do I make a new service instance? Or can the single service spawn both?

You will need to setup a new service. Make sure that the new service is running the agent in a different directory to avoid problems with concurrent use of workspaces.