Shipper Values won't populate from API

We're utilizing the classic API and are posting new orders to 😀

https://{instace_id}.roserocket.com/api/v1/orders

Everything works except that the "Shipper" fields don't appear/populate when the order is created in Rose Rocket.

In our case, the Shipper details exist in the system and we verified that they match the org name/address that appears in the address search in the shipper field.

Is there some other property we need to set in the request in order for the shipper/from data to save on the order? We can't seem to determine it from the dev tools.

Here is an example request:

{
"location_id": "{uuid}}",
"tender_num": "SHIP12345",
"ref_num": "SHIP12345",
"po_num": "PO987654",
"shipper_num": "SO123456",
"pickup_start_at": "2026-06-05T00:00:00",
"drop_off_start_at":"2026-06-10T00:00:00",
"from_org_name": "John Doe",
"from_address_1": "123 Main St",
"from_city": "Anytown",
"from_state": "CA",
"from_postal": "90210",
"from_country": "US",
"to_org_name": "Jane Smith",
"to_address_1": "456 Elm St",
"to_city": "Othertown",
"to_state": "NY",
"to_postal": "10001",
"to_country": "US",
"type": "point-to-point",
"bol_instruction": "Handle with care"
}