Source control profiles enable Silk Central to integrate with external source control systems.
Once deployed, custom source control plug-ins can be configured in Silk Central, allowing you to define where Silk Central execution servers should retrieve program sources for test execution.
See the sources of the package com.segue.scc.vcs.subversion at C:\Program Files (x86)\Silk\Silk Central 20.6\instance_<instance number>_<instance name>\Plugins\subversion.zip to see how these elements fit together.