Step 1: Click on the Add-ons tab from the vertical menu bar within Kodi.
Step 2: Click on the little box icon at the top left corner of the Kodi Add-ons interface.
Step 3: Select the Install from zip file function.
Step 4: If you've never installed a Kodi addon before, it will prompt you to allow unknown sources.
For more go to:-
complete kodi setup wizard