Once logged in, click on "Setting"

Under the "Profile" section, place your backlink in the "Blog URL" field and another backlink in the "About Myself" field.

Your first 2 backlinks are ready.

Now, under the "Community" section click on "Create Community"

Place your backlink in the "Description" field using the format as shown in the pic.

Voila! Your 3rd backlink is also ready.