PA_TRANSACTION_INTERFACE_ALL System linkage

Hello Experts,

I'm exporting project data from Primavera( P6 ) to EBS. In particular, I'm exporting Actual cost info for the Resource Assignment object.

I'm using the 'PRC:Transaction Import' standard import program by passing P6 data to PA_TRANSACTION_INTERFACE_ALL table.

For resource level Actual cost , How do this program or table identify for which resource I'm passing the actual cost data ?

Using System linkage Column ? Is there any alternate column to provide the resource details ? How does EBS create the Actual cost info on that particular resource ?

I don't see any resource related columns like resource_assignment_id or resource_name etc etc.