i just need to have an idea how to attach a c-pannel to a website ?

quite a vague question. You will probably need a CMS (content management system) this will allow you to edit your site (with limitations) and use a template. You could use Silverstripe, Drupal or Joomla - all are fairly simple to set up, but do take some time to get used to

whats the site for? and what c-panel are you looking to use?