So I don’t believe that any forgotten pipes will then be left exposed in front of the wall. After all, there is also a 5 cm thick insulation on the inside, which can easily be chased for such things, pipes, cables, etc. Then plaster is applied accordingly and normal drain pipes should be able to disappear inside. Likewise, for heavy items that you want to screw to the wall, you can first cut the corresponding grooves and screw a wooden batten as a spacer directly to the concrete on the wall, and then attach the cabinets etc. to it. So you don’t need any anchors that have to bridge the 5 cm insulation. Filling also works differently. You can’t raise all the walls and then pour concrete in afterward, but have to fill in heights of about 1 m, let it dry, and then continue building up. First, so you can still compact it at the bottom, and second, because if the concrete falls from too great a height, segregation/gravel nests can occur. So the concrete has to be delivered several times, and then the amount should be right.