@Mark_Brown, here are a few links to help you onboard devices.
1) From the cnMaestro home page, click on the DOCUMENTATION icon (right side) to access the user guide. Check out the "Onboarding" section.
2) Check out the following Knowledge Base link
https://help.cambiumnetworks.com/hc/en-us/articles/229983988-Device-On-boarding
It refers to the following which will hopefully answewr your question.