Creating a plugin that creates a custom project but I don't know how to add the VCS directory mapping

So I'm trying to extend this highly maintained plugin https://github.com/bazelbuild/intellij. It creates and idea project with all the required data inside the .ijwb folder under the root. So far everything works correctly but VCS auto-detection does not work since the base folder now is root/.ijwb while the .git folder is directly under root. If I manually create a directory mapping in the VCS section of the settings it works without any problem. I can see that project generation is being done here but I'm not sure how to add the VCS section https://github.com/bazelbuild/intellij/blob/5c7a4bb45be8ad95396fe6e76c00f0589e354630/base/src/com/google/idea/blaze/base/wizard2/BlazeProjectCreator.java#L107