Link between Delivery Line Item to DTR Line Item to Freight Unit Number?

Dear All,

I am creating DTR with reference to delivery from ECC. As per my logic in FUBR, I am creating separate Freight Unit for every DTR line item.

Now how to identify (At Table Level) that which DTR line item belongs to which Delivery Line Item?

Also how to determine which Freight Unit belongs to which DTR Line item?

Request to please share the above flow at table level in SAP TM System.

Regards,

Vibhu Gupta