How can I add Links to the Top Navigation of WP-Admin

Hi there!

Could you give me some feedback about the best way to add Links to the Top Navigation of WP Administration?

I'd like to create new links for Pro-Sites Subscription page and for Support.

I know for Pro-Sites we can use a button to access the subscription page, but we are using a custom admin template and it's very miss-placed. Also, we would like to add custom links (shortcuts) as well.

Thanks for your help!