As we are talking about merged webhelp, I wouldn't put
anything in the parent project. Make that a blank page with a
redirect to the main child project. That way, all the links are
between child projects so you avoid the problem of broken links
that occurs when you generate the help.
This is described in more detail in this topic.
Click
here.
Help others by clicking Correct Answer if the question is answered. Found the answer elsewhere? Share it here. "Upvote" is for useful posts.