Location of UPC, EAN numbers in database

[JuiceyBrucey]

Hi, when looking in the jiwa interface for inventory items, there is an input for UPC which I presume is also the EAN and barcode number.
When I looked in the SQL database IN_Main table for this field, it does not exist. In my clients table, this data is (sometimes) stored int he Aux2 field of the IN_Main table.
Is this the actual location of this data, or is it located in another dependent table?
Cheers

[JuiceyBrucey]

This is resolved.