Theft deterrent mount for Opel Ampera charging cable with meter

I wanted to make a safe station to connect the charging cable of my Ampera to the mains socket outside my home. The safety goal was: "cable not easily removable without crowbar."
I also wanted some protection from elements (it is mounted outside, but under the roof).
I added a cheap energy meter to get an overview of energy used and to be able to check charger function. For standard EU in-wall receptacles with earth contact (schuko).
Please be safe and install only if you have the necessary