The idea was to replace my old living room coffee table with something new and useful. The final solution I came up with is easy and works great.
I used a LACK coffee table and the LACK TV Bench, then I cut out the table top so that the lower plate of the LACK TV Bench fits in. I added some wooden corners beneath, so that the plate has something to sit on.
The top of the TV Bench with one of the sets of legs glued to it as spacer is mounted below the table, to create space for the power-cords and power supplies.
The main power cable I have routed through one of the legs and added a PC-powercord-connector-jack to it which nicely fits into the leg. Finally I drilled some 60mm-holes into the center plate and added some cable gateways and a QI-charger for my phone.