Advice for setting up Netgear Nighthawk X4S Extender

[Randalls]

I have an open box Nighthawk X4S extender. It did not come with a quick start guide. I am trying to get a signal to my basement to a top floor xfinity router. Anyone have any experience with this? I am not a tech savvy person. I managed to get 2 solid signal lights but I did not see the augmented name of the wifi network.
Any advice much appreciated.

https://nighthawksetp.com/netgear-nighth...200-setup/