We’ve already pre-loaded the alerts from your stream package onto Streamlabs to make them super quick to install. 
Installing the alerts:
    1. Head over to the Widget Themes page on Streamlabs
    2. Create a new widget theme and give it a suitable name
    3. Refresh the page and link the widget theme you just created to the “Scene Collection” you would like to import it to
    4. Save your settings at the bottom of the page
    5. You should already have an alert box in your “Livescreen” scene (if you’ve already installed the .overlay file). If you don’t then you can add one from the “Sources” tab
    6. Ta da! Your alerts should now be linked and working. You can use the “Test widget” buttons to see if they work.