Ok, the issue… YOu have WP Super Cache installed and activated. You were not seeing your changes because WP Super Cache was displaying the old page without the change. Pro Tip: always deactivate your cache when making changes ;)
So, clear that cache and deactivate it and you will see your changes.
Hope that helps!
ps. A couple issues I did see and fixed. The folder was named
connections-template instead of
connections-templates. There was also a coding error in the
card.php template override file.