Does maven central expects Source URL to be shared?

I need few clarifications regarding releasing the artifacts in maven central. I could see in the requirements that for SCM information project URL need to be added, which means whether we supposed to share the source via SCM. Since my understanding as maven central is public repo and so they expect source need to be shared or we can share our github link (which may point to source related demos).

Since working in an organization we are not interested in share as open source. It is will be commercial project, whether we can release the artifacts in maven central with SCM Url pointing to source demos. Can anybody share your valuable suggestions?

Note: Artifact to be hosted is for commercial purpose.