Grant Contributor to Upload Files

Hi,

I need to grant the upload file capability to all contributor users in WordPress. I understand that this will involve either the current_user_can or add_cap function, but I don’t know what file is designated to assign capabilities to users. What file should I tweak the settings?

I saw a sample configuration on the Codex page, and I’ve created the following excerpt:

function add_contrib_caps() {
$role = get_role( ‘contributor’ );
$role->add_cap( ‘upload_files’ );
}
add_action( ‘admin_init’, ‘add_contrib_caps’);

I looked up admin_init, and it’s suppose to run before the back end panel starts. So, perhaps I should place the function in the admin.php?

Angela