Thinka is meant to be installed in your meter box on a DIN rail. A professional KNX system integrator should be able to do this. We have a video showing the installation, see our video channel.
In case something is not clear or not working according to your expectation you can contact us, and we will provide instant feedback. We can be reached by email at support@thinka.eu, or by phone at +31-20-2420666