How to access R7000 when set as an access point?

> I connected a laptop directly to the R7000 and logged in and enabled
> the "Remote Management" Option

   That would suggest that you haven't actually 'set up [your] "old"
R7000 as an access point', because, if you had, then that feature would
be disabled.

      https://kb.netgear.com/26765

   So, what you _actually_ did is a mystery.  That includes what you
connected to what, and how you configured anything.  (Hint: If a device
has different types of ports, then "connected to device" is not enough
detail.)

   It might be educational to compare the IP addresses of devices which
are connected to your R7000 with those of devices which are connected to
your R8000.  Those would all be on the same subnet if the R7000 were
actually configured as a WAP.

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual (at least).  Read.  Look for
"Set Up the Router as a WiFi Access Point".

> I think I have come up with a "Work Around"

   If you actually had done what you said you had done, then there'd be
nothing to work around.  If all you did was to cascade two NAT routers,
then there might be more to work around than you've yet discovered.

> With that enabled I can login the router [...]

   How, exactly?