I'm not sure if there is a notes box for you to add a link like that to when you do your submission but the repository should be private anyway so a link isn't that useful.
I wouldn't worry though as you have already shared your repository with me and I can see the changes you have made. I might need to give you an additional username to share access with while we judge. I'll let you know if I need you to do this.
Anyone who hasn't shared their repository with me should do so now (Beeski)!