Property planning: Position of house connection (mixed water disposal)

But how far will the drainage connection be laid onto our property? And how is the inspection chamber related to it? Can't I have the drainage connection laid up to the green cross and have the inspection chamber placed there? Otherwise, we would have it directly on our future driveway

The wastewater drainage is carried out via a sewer whose location can only be told to you by the responsible "supplier" (municipal utilities or the like). You will have to get quite close to the boundary of the public street area with the section of the pipe you have to procure. They roughly account for a few dozen meters, but here they can already be consumed by the access road. Your inspection chamber will be at the transfer point; this is not a wishful thinking but something to be clarified with the "supplier". They usually have a "builder consultation" for this. However, currently, you will only be able to agree on general conditions; your drainage planning will only be done by your architect. The manhole covers are usually truck-drivable and therefore do not technically interfere with your driveway. I don’t know what kind of inspection chamber you have in mind: this is not a place where some random guy from the health department comes to collect stool samples from you every few years ;-) but apparently your wastewater "supplier" wants a maintenance opening above the point where your house drain pipe connects to the public drain pipe. Your idea of "out of sight, out of mind" to "place" the thing in some corner is logically nonsense – it must be in the path of your wastewater (which is not supposed to take detours).