How does Parent ATO job link with Child ATO Job

Hi Guys,

For a  manufacturing scenario business needs to setup some customer specific setting for ATO items. The Parent ATO has a child ATO item in its BOM (ATO under ATO Scenario). When a sales order is progressed it creates two work orders  for both the ATO items. However the Parent ATO item Job  is linked to sales order (source_line_id) in WIP_DISCRETE_JOBS table  but there is no link for Child ATO job with either the sales order or the Parent Job.

Can you suggest anyway where I can link the Child ATO job with either source sales order or Parent Job (for which it is reqd).