How to connect Surface Hub 2s to a Hidden Network?

We have been trying to connect our Surface Hub 2s to a hidden network but have so far been unable to find any settings menu that allows for configuration of a networks details on the device. 

Is there a way of accessing a control panel (or similar) on the device? 

I've read online about clicking on the charms bar in the bottom left of the screen but it appears to be missing from our device?  

Any assistance would be greatly appreciated.