Once logged in, click on "Update"

Now, write your content along with the contextual backlink in the "Introduction" field using the format as shown in the pic below.

Your first backlink is ready.

Now, go to "Group" at the top and then click on "Create Group"

Select the options as shown in the pic and place your contextual backlink in the "Introduction" field.

Voila! Both your backlinks are ready.