Lucky for you I had you in mind when I wrote this doc.
First,
-L<define the version|DBIx::Class::DeploymentHandler::Intro/Sample_database>
+L<define the version|DBIx::Class::DeploymentHandler::Manual::Intro/Sample_database>
in your main schema file (maybe using C<$VERSION>).
Then you'll want to just install the version_storage: