How to assign subscriptions to multi-socket server?

In the past there were subscriptions for different number of sockets. Now there are only two socket subscriptions. How to assign them if server has more than two sockets? SUSEconnect needs one activation code and code is always for 2 sockets; how can I register 4 socket server as example?
All documentation I could find says at most that multi-socket server requires multiple two-socket subscriptions but there is no explanation how these subscriptions are actually assigned to this server.