How do I add PCI cards to a newly created domain?

 We have a M5000 that we have split into two domains. We have since added two PCI cards to IOU#0 PCI#2 and IOU#0 PCI#3. We are having a difficult time trying to determine how to add these new cards to the newly created domain. In reviewing table 4-3 in the SA domain configuration doc at http://docs.sun.com/source/819-3601-17/Domains.html, it appears we need more the one I/O module to accomplish this task.  Is this correct? If not, how do we add the cards to the new domain?