IC Transaction Number Series

I have configured inter-company setups with two companies. Assigned a new PO number series PO-IC-001 in Company A and a new SO number series SO-IC-001 in Company B. While doing IC Transactions, from one end when I create a PO using above PO-IC-001 number series on the other end I need all Sales Orders to be created in Company B using SO-IC-001 number series. How to assign a SO Number Series against a PO Number Series.