I have not heard anything specific on this subject.
I'm not sure if it is really possible to specify a particular place in the system as a waypoint for an EDSM expedition. At least in those I've participated just visiting the system did the job. I found out that my friend got the mark for Sol on the second attempt. I will ask him if he docked somewhere or scanned something to achieve this.
I did the DW2 expedition and the first waypoint for that was the Tourist Beacon in Pallaeni.