Education licence: activating during silent install

I’m trying to deploy Sketchup 2015 with our education license. This is basically an individual license with unlimited activations.

However, the only way I’ve found of activating the license is to put an activation_info.txt file inside %ProgramData%\SketchUp\SketchUp 2015 (from here:

The first time Sketchup is started on a computer, the user has to click “Add License” and do the activation themselves.

Since the fields are already filled (and the licensing info in a publicly readable, clear-text file on the computers), we can only hope nobody will pirate our key. In fact, this is not simply “our” serial number (for organization - a school district), but the serial number for the whole department of education of my province.