Sold to party name2 to name 4 change Check in MV45AFZZ

Hi

I have a Requirement to check the field value change of sold-to-party name 1 to name4 in user exit MV45AFZZ in VA02 Trnas. But in vbpa we have only name1..? but name2 to name4 are not in this VBPA table . where will it be stored ( in any other table) during sales order change..?

ThankS .

Message was edited by: Deadlock1