Edit Code On Latest Posts Home Page

Hello,
Trying to make site secure by Google standards and know that some links in current Home page are https:// not https://. This is stopping me getting a padlock.
Have searched various places but cannot seem to find where the code for the page is so that I can edit these links.
Guidance will be gratefully received.
Thankyou
Neil

The page I need help with: [log in to see the link]