Place your slider inside your wellside in the position would want.

Make sure that it is square and does not foul with the tailgate.

Open the slider to access the mounting points.

Before drilling through the bottom of your wellside ensure are going to mount the slider in a place that is accessible to fix down, and that the underside of the wellside is clear of any brake/fuel lines or electrical cabling. 

once you are happy you are drilling in a safe location, open the slider, drill an 8mm hole and insert the fixings provided.

use the fixings provided to secure the slide to the wellside floor.

installation is now complete