How to add new field to Customer Aging Report?

Hii,

I have to add field name PaymTermId from CustTable to CustAgingReport Report. 

I have added this field in CustAgingReportTmp table.

In CustAgingReportDP -> insertCustAgingReportTmp method and insert_recordset custAgingReportTmp I am not getting from where the values are coming.

From where to get PaymTermId value and save in temp table?

Thanks