Sales Order - with Manufacturing in different Branch Plants

We have the following situation:

Enter sales order that has two items.  The first item in a configuration from Branch Plant 1(BP01).  This work order will complete into inventory serialized.  The second item on the sales order is also a configuration.  It will be made in Branch Plant 2 (BP02).  When this work order is complete, it will be in inventory as a serialized product. 

Once both work orders are done, the item from BP01 will be physically moved to BP02 and attached to the second item.  The completion of this assembly will then be shipped on the sales order, both lines together.