Adding data sources for desired integration is quite easy.
You just need to go to the Sources page, click on the integration you want to add, and click on the + button on the right.
See screenshot below:
You will now be taken to your profile within the source you want to add. In this case to your Facebook profile.
Some integrations (like Rank Ranger) require you to enter the authorization token.
Some integrations needs you to have access to API of application in order to get them connected to Reportz