The Masso base attaches to the left side (viewed from front) of the Masso Touch unit utilizing the back side of the left relay threaded holes.

 

 

There are 2 options for the Masso Base. The Surface Mount and the Surface Mount with Manual Override Switch (MOS)

 

In your package you should have received: 

Masso Base w/ (2) M3x10 Socket Screws

and

Surface Mount w/ (2) #6 3/4" wood screws 

or

Surface Mount & Manual Override Switch (MOS) w/ (4) #6 3/4" wood screws

 

After following the above instructions for installing the keypad mount on the Masso Base, you're ready to install the Mount on your Masso Unit. 

 

The Masso Keypad Base is installed on the left side (as viewed from the front) and secured on the back side of the preinstalled threaded inserts with the provided (2) M3x10 Socket screws.