Disqus plugin and Google Analytics

Hello!

How to connect Disqus with Google Analytics?

I have found this:
https://help.disqus.com/customer/portal/articles/466258-capturing-disqus-commenting-activity-via-callbacks

but it doesn’t explain where to put the code, and this solution doesn’t work anymore:
http://wordpress.stackexchange.com/questions/119393/tracking-disqus-comments-on-google-analytics

Any hints what to do?

https://wordpress.org/plugins/disqus-comment-system/