Hi Martin,
I know it is an old post. But maybe someone finds it useful. The bin locations are not saved in the document, but you can retrieve them like that ( just replace DOCNUM with your value ) :
SELECT
t1.BASE_REF AS DocNum
,t1.DocLineNum
,BinCode
,Quantity
FROM [dbo].[B1_OinmWithBinTransfer] T1
LEFT OUTER JOIN [dbo].[OBTL] T2 ON T1.[InvPLMessageID] = T2.[MessageID]
LEFT OUTER JOIN [dbo].[OBIN] T3 ON T3.[AbsEntry] = T2.[BinAbs]
WHERE BASE_REF = '<DOCNUM>'
AND TransType = 15 --Delivery
TransType is defining the document type.
hope it helps,
Maik