Advising students taking part in a competition: how to provide direction, but not to contribute? I was asked to supervise a team of undergrad students
who are taking part in a case competition.

I decided to look through the competition website
to find out more about what is expected of a faculty advisor.
The website writes:


  The primary role of the faculty advisor is to provide direction, advice and guidance to the student team.
  The faculty advisor should not contribute to the content of the presentation, nor should they provide or facilitate the assistance from other parties that contribute to the content of presentation.


How do I walk the fine line between
"providing direction, advice and guidance",
and yet "not contributing to the content of the presentation"?

(This is my first time helping a student team with a competition,
so I would appreciate the advice of other faculty who have done this before.)
I have only worked as a TA to help students on an individual exercise basis, but I think the idea is kind of similar to this. In the case of a competition like this I can only speak from my role as being supervised. 
However, I would say that the most important thing is to ask questions, such as "Why do you think that step X that you propose here would be a good step?" or "What results do you expect by doing this thing Y you're doing?". This should make them think about what they are doing in this competition and why they are doing it.

Regarding the presentation, you can of course always give them advice about how to present, how to style their slides, and how to convey the information they are presenting in an efficient way.

All in all, with most things you help them with, just ask yourself if you're telling them how to do it. If not, you're probably fine I guess.