connecting database

[eluser]Captain_Fluffy_Pants[/eluser]
\There's a bunch of files in codeIgniter named Database. So i was wondering witch is the right one to connect it to?

[eluser]CroNiX[/eluser]
?

All you do is setup your db credentials in
/application/config/database.php

And either autoload the database
$autoload['libraries'] = array('database');

or do $this->load->database(); in the controller.

Have you read the user guide for databases?