Hi Than,
If I understand you correctly, you’re wanting a link in the admin menu directly to the quotes page. To do this add the following to your theme’s function.php file:

function register_custom_menu_page() {
    add_menu_page('Quotes For Widget', 'Quotes For Widget', 'edit_posts', 'post.php?post=000&action=edit', null, null, 6); 
}
add_action('admin_menu', 'register_custom_menu_page');

The URL will need to be changed to suit your installing, either changing the ‘post=000’ to the page number for your Quotes post, or if you’re using permalinks changing it to the appropriate URL for that.

Hope this helps!