Don't forget to add a couple of cat5 or cat6 cables to the coax/hdmi run. Easier to do it now rather than later!
Coax/hdmi cables ideally need a sweeping bend rather than a tight bend about the radius of a tin of beans is ok. That is achievable in a double back box . Also bear in mind that if...
Our double back boxes don't have screw positions in the middle like the orange ones pictured.
Section 6 of the installation instructions shows a metal plate that only fits a single box, but and it's a long shot, if your existing box has fixing positions at the top and bottom of the box as some...
What were they thinking drilling through a power brick like that??!! How is the cable connected internally? Be careful as I can see exposed remains of the plug pins that might still be live.
That brick with the cable through a drilled hole needs to be replaced and a socket fitted to the cable...
Is there any reason as to why the new sockets can't be "normal" 13a sockets rather than schucko? You could just move the internal socket the outside of the cabinet.