DMS (Object Link) not attached to Order BOM Item but linked in Master BOM Item

We have a need to link to DMS document as attached to Master BOM Item for easy viewing from Production Order Component screen to instruct our Stockroom workers to pull the proper Material and pieces from Stockroom before start build cycle of Production Order. We have configured Document Type, Object Link with DRAW (Doc Info Record), PORDER (Prod Order) & STPO_DOC (BOM Item) & Production Scheduling Profile (OPKP) from IMG. See attached screens below for details.

We have changed Master BOM item 0002 & 0020 to link to DMS document which seems to be fine as we'd view the document with no issue. However, after we created/released Production Order that tied to this Master BOM, the DMS document are not brought over to Order BOM Item as we hope. What did we do wrong? What config settings we need to change to make it work? Any help is appreciated.

Thanks,

Tracy Leung