These installation already all appeared in the nav panel, I posted about this 2 days ago, if the dark wheel station was one of these installations then it would appear in the nav panel and we would already be able to see it there. If it's not one of these installations and didn't previously appear in the nav panel there's no reason for it to appear in the system map suddenly. What they appear to have done is change the hidden filter in the nav panel that we couldn't previously access, just like turning asteroids or stations on and off. This is obviously part of colonisation so the system architects can see where they have placed installations in the system, whether it was supposed to pass through to all players I don't know, if it was a mistake it will probably be turned off again, if it wasn't it won't assist to find Raxxla because if Raxxla is hidden in such a way it didn't appear in the system map or nav panel it will still be hidden.
Personally I don't believe you will find the dark wheel station so easily, if it even exists, I have a mind that the dark wheel is not what everyone thinks it is, but then there are a lot of opinions on that matter.
We already check all 8th moons in the potato hunt so it's not going to be within 200ly of Sol.