That's not how it works in this case. Solo CK isn't a traditional pool where they pay out proportionally, you still get the block reward sent to a solo address.

Solo CK just provides the service of managing a node and creating block templates as well as sending work to miners. Solo mining on your own node is cool but most solo miners aren't well equipt to do extensive testing on latency and uptime to make sure they are maximizing their reward potential.

Whoever runs Solo CK takes 2% for this service and it goes to a separate address in the coinbase transaction. Check the pool history to see how this works.