How to specify which Control Budget should be used for transaction evaluation?

Summary:

How to specify which Control Budget should be used for transaction evaluation?

Content (please ensure you mask any confidential information):

We have two Control Budgets in our application attached to a single ledger.

Bothe the Control Budgets have the same Budgetary Control Cube name.

Its seems our live transactions are performing the budgetary control evaluations against the control budget we have created first. We wish to keep both these control budgets active, but need to ensure our live transactions perform the budgetary control evaluation against the other budget, the budget we created for the second time. Can someone please help me to understand how we can point to the application, to inform which control budget the application should use for it's evaluation please? Thank you.