After you have:
Flashed and pointed your devices with the Mesh Config Utility
Placed and plugged in your devices on site.
Created a Mesh in MESHdesk
you can now add your devices to your Mesh:
Fill in a Name and a description of which node it is, e.g. Primary node main office. The more descriptive you are, the easier the nodes are to manage later.
Select the hardware model of the node.