[CentOS] kickstart install using url location

Hi,

I am working on a kickstart install method and it works fine with
cdrom as installation media. I would like change this media to an
online resource. I saw option as - 'url --url http://<server>/<dir>'.
I am not sure what should be the directory contents? Should we put all
ISOs in that directory or what? Any insights?

Thanks,
CS.