Unbilled Receivable Adjustment Journal Entry Line link to Revenue Element

I am working with ODBC Netsuite2.com data source.

I need to know the source of Unbilled Receivable Adjustment Journal Entry Lines

I do see "createdfrom" column in the transactionline table but it contains only the transaction id of the Revenue Arrangement, not the id of the Revenue Element/Plan.

What is the link (foreign key columns) that connects transactionline of the Unbilled Receivable Adjustment Journal Entry Line to Revenue Element/Plan that triggered it?

Or, maybe, there is a dedicated table that manages Revenue Element (or Plan) to Unbilled Receivable Adjustment Journal Entry Lines connection?

I know that some fields/columns are not visible to ODBC out-of-the-box, so if there is such a field which is not visible, please tell me what it is and I'll ask the developer to add as custom column.