WP-Cumulus Plugin Add Continue Reading Link To Tag Archive Page

I would like to add a Continue Reading link to the results shown on the Tag Archive page–the page you get when you click on a tag in the WP-Cumulus widget.

I believe the code should be:
<span class=”continue”> “>Continue Reading</span>

… but I’m not sure where to put this.

Thanks for your help!

https://www.ads-software.com/extend/plugins/wp-cumulus/