ok - still difficult to see whats happening so a bit of guesswork
the quickstart kit usually comes with a 1metre cable - the one in your hand looks longer than that - they also do a 3 metre one that i thought came when a TV box was involved - maybe you have that - either way thats all you need if you want the hub in the area of the wall box
there are 2 white squarish boxes in the photos - one [the larger] is a phone box - that has a wire going back to the wall box - it will pass through the wall and connect externally in the outside box - all that can be removed - better if a tech did and its dangerous so that should not be a problem
the other box i am not sure about - it could be a splitter that fed a TV box
you can certainly tidy it all up and make it safe so the children dont get to it - cover it with a box or similar
i will flag the thread to VM siting that the wires are if nor dangerous a health and safety issue and am sure they will get a tech to sort it
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Tony