Latitude 7520 wireless power

I'm a retired IT tech helping a friend setup her factory refurb Latitude 7520.  I'll be helping her remotely so I can't physically lay my hands on the laptop.  I'm not familiar with this particular model and looking through the Dell setup and service manuals for this particular model I don't see any reference to any wireless power switch, either hardware slide switch or FN keyboard.  Also noticed no ethernet port at all.  Do I presume correctly that the wireless is always powered on or maybe software switched?  I know that as laptops got thinner ethernet ports began disappearing.  Is there any ethernet capability with some dongle?  Thanks for any input.