I live in the Netherlands and I have a router which I would like to hide away in my closet. Currently, it gets internet from the telephone socket seen in the image below.
I would like to place this router in my closet, near the electrical service panel, seen in the image below.
The closet includes an electrical socket, however, it does not have a socket for the internet/telephone connection. I assume that my internet/telephone cables do pass through the closet as it's the main entrance for outside connections (electricity, gas, water etc.). How can I find out which cables these are? What is a good way to hack these cables and make my own internet-socket there?
I understand that the information I have provided may not be enough to describe a detailed plan of what I should do. My question here aims to get information which can guide me in connecting the internet plug seen in the first image to whichever wires are the telephone connection in the last image.