In KODI, click on SYSTEM, then tab over to File manager and click on it.
On this page you will click on Add source.
In this box you will enter http://fusion.tvaddons.ag
Click either enter or done to move to the next step
In the bottom box we will name the media source fusion.
Click OK. That was easy! Now you know how to install fusion on KODI. To take advantage of this great feature you may want to look into instructions for installing the Config Wizard, a one click auto install of all the top rated KODI addons in a beautiful layout.