Show Bin Location in Sales Order Entry Sage ERP 100 2014

I added a UDF in Sales Order Detail for the Bin Location, but I cannot find out how to get the default value.

I know the data is stored in the IM_ItemWarehouse for that Warehouse/Item combination.

The client had the Bin Location when they were using Shipping data entry, but they do not want to use that anymore.

Thank you in advance.