How to select MS SQL instance for 'Real time graph for a monitor'

How to select MS SQL instance for 'Real time graph for a monitor'

Hello, I have Windows Server with 4 named instances of MS SQL(no default instance).
When I add to my dashboard 'Real time graph for a monitor', device name, monitor category MS SQL, monitor Active transactions, pool interval and time window.
It shows me Active Transactions for my fourth MS SQL instance(with list of databases).

How do I choose 'Real time graph for a monitor' to show me Active Transactions for second MS SQL instance?(there is no instance selection there)

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