(Not getting your question but will try to answer as i understand.)
To put a link on your Hubpages account(for this particular case a "facebook profile link")follow these steps:
-Log in to your facebook account.
-Click on the "profile" tab when logged in to open your FB profile page .
-Now click once in the address bar(where you type a website you need to visit) and using the keyboard press CTRL+A keys simultaneously.) to highlight your FB profile url.
-After, press CTRL+C to copy the link in the address bar (your FB profile url) or right click and select copy from the pop down menu.
(And the facebook part is over...)
-Log in to your Hubpages profile
-Once logged in ,Select "edit profile" to go to the profile editing page.
-On the right i think you see "Bio"
-Now in your bio add these words "become a friend on facebook" or whatever you wish....
-Now highlight what you have just typed.
-I think u see something like a "chain" on the bio box. click on that and another window will pop up.
-In this window, you'll see "link url"-
-In the link url field, press CTRL+V simultaneously to paste the link we copied in step 1(your FB profile url.)
-Confirm by clicking on insert
-Now Save changes and you're done.
---If you were meaning connecting your Hubpages posts to FB, please clarify-----
Hope this helps