R6300 Cannot log into, want top change it to a WAP

> Have a Spectrum wireless appliance.

   That tells me nothing.  Has it a maker and a model number?  Is it
some kind of router, or modem+router, or what?

> Have a R6300.

   So, definitely _not_ an R6300v2?

> [...] Look for "Model" on the product label.  Firmware version?

   Still a mystery.

> Plugged the R65300 into the extra LAN plug on my PC.

   You ran an Ethernet cable from some hole or other on the R6300(?) to
_what_, exactly?  You'd likely be wiser to use one Ethernet interface on
your computer at a time.

   A cable has two ends.  For each cable, what, exactly, does it connect
to what, exactly?  (Hint: If a device has different types of Ethernet
ports, then "connected to device" is not enough detail.)

> I probably need to unplug the Spectrum wireless.

   "unplug" what, exactly, from what, exactly?  Why?

'

> Then I amy be able to access the R6300 to change it to a WAP???

   I'd call the instructions in that thread cited above pretty clear and
detailed.  Nothing there mentions a second Ethernet interface on the
computer.  I'd stick with those instructions.