hAPac 2 using as a wired wireless extender don't know where to start

I have been using a HAPac2 which is wired to the Plussnet router on the other side of the house. However today it was reset (%99 sure it was my gf because the WiFi wasn’t working but thats another story) and I haven’t a clue how i originally got it to work. I don’t understand scripting and networking so I’m almost a lost cause.



Thanks in advance