Unzip all files into your local install's "\FactoryGame\Content\Paks" folder.
Example for default from Epic Games Launcher:
"C:\Program Files\Epic Games\SatisfactoryEarlyAccess\FactoryGame\Content\Paks"
All sweetTool mods require sweetToolBase. Install it the same as above.
You must also have the latest release of SML. Visit that site, under Latest Realease click on View. Follow the instructions on that page to install SML.