ORBI RBE870 as access point question

Hello,

I want to replace my RBR50 because one of my Satelites refuses to connect.

It is now connected as AP and that works (worked) amazing, so I want to set up the RBE870 the same way and I have a question about that.

In the instructions it says to connect your Orbi router to i-net router via ethernet. Next it says to connect your browwser on your laptop to one of 2 websites, but with wifi internet gone, how will that work? Or do you have to connect your laptop also via Ethernet to the either the i-net router or Orbi router?

Any information (video links) are very much appreciated!