- Put 'wastelander2' folder into "mods/update/x64/dlcpacks/".
- then navigate to 'dlclist.xml' in "mods/update/update.rpf/common/data/" Add -
  "<Item>dlcpacks:/wastelander2/</Item>" 

FiveM Version: 

Drag & drop the 'wastelander2'folder found in the FiveM Version folder and ensure it in your server.cfg