This is a two part model designed to mount to a single gang junction box or directly to a wall surface.  The base has holes for the j-box as well as holes to add threaded inserts to mount the Network Dock.  I couldn't quite get the ethernet cable to route internally because of the height of the USB-C cable taking up so much room, so it's not tamper-resistant, but it works for our needs.  

The case hinges on a cleat and is secured via two additional threaded inserts.