In order to connect 3rd party accounts to your WarriorPlus account, such as Facebook, Twitter, LinkedIn and Google+ etc:
Click on your username in the upper-right hand corner of WarriorPlus.com and then select "edit profile" from the dropdown menu. In the right sidebar, you will see the "Connected Accounts" column, which will display the 3rd party account options that are available to be added to your WarriorPlus account.
Then, click the BLUE BUTTON that says "Connect Now" to the right of each option and follow the steps to connect your account.
If you are looking to connect your Warrior Forum account to WarriorPlus, check this article here: How do I connect my WarriorPlus account with my Warrior Forum account?