How can I fix my Renault Clio 2002 dynamique?

I broke my air vent on my reanault Clio 2002 on my drivers side on the dash I have bought new vents from Renault in a panic and I have looked at how fit them. But there seems to be screws holding them that I can't get to, I have looked under the bonet but I can only see the blowers. Any solutions?