SR_SHIP_TO_LOC_ID not populated in DENORM table

Hi Experts,

we have created an Integration Interface (Forecast to ASCP - Item-Org-Customer) to Export data to ASCP. When we run it, it doesn't populate the SR_SHIP_TO_LOC_ID column in MSD_DP_SCN_ENTRIES_DENORM table. I have selected the Item Destination key, Org Destination Key and Site Destination Key while creating the Integ Interface.

Also, if I create Integ Interface at other level (like, Item-Org-BillTo), it neither enters the SR_CUSTOMER_ID field, nor the SR_SHIP_TO_LOC_ID field.

Could you please let me know why these columns doesn't get populated correctly and what are the possible mistakes I might be doing.