How can I add a new lib path without call each one on the header?

function my_custom_enqueue_scripts() {
        if ($handle = opendir(get_template_directory() . '/custom-stylesheets')) {
            $i = 1;
            while (false !== ($file = readdir($handle))) {
                if ($file != "." && $file != "..") {
                    wp_register_style('custom_stylesheets_' . $i, get_template_directory_uri() . '/custom-stylesheets/' . $file);
                    $i++;
                }
            }
            closedir($handle);
        }
    }

add_action('wp_enqueue_scripts', 'my_custom_enqueue_scripts');

Add code to a file: functions.php

Styles should be located: you_theme/custom-stylesheets/