While signing up, create a contextual backlink using the "About" section of "Complete Your Page"

You can check out the backlink in the pic below and then proceed ahead to create your second contextual backlink by clicking on the '+Create' button.

Further, click on 'Post'

Now, write your content and place your second contextual backlink.

Hit the 'Publish Now' button

Voila! Your backlink is ready.