Need inputs to fetch balance "Reference" field value against balance dimension

Summary:

Need inputs to fetch balance "Reference" field value against balance dimension 

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In the Employee Payroll balance results we are able to see Balance name, Balance Dimension, Reference and Value. For few balance dimensions Reference field value will provide and for few dimensions it will not populate. Is there any setup where we define Reference against balance dimension and also in which table/column holds this reference value. Attached screen shot for your reference.

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