To add a Nephoscale cloud, you 'll need the username and password provided by NephoScale, the same ones you fill in here:
On ClearGLASS click on 'Add cloud'.
Select Nephoscale from the provider's list and fill in your Nephoscale Username and Password:
Once you click on Add, ClearGLASS will try to authenticate with NephoScale. If all goes well, you should see a list of your VMs in the Machines section.