Adding a EX8000 to a WIFI network that I already have an AX6000 on

[ams76]

I just upgraded my Spectrum Router and Modem to their latest models, router is a wifi 6 router.  I came back and added my existing Nighhawk extender to it, the AX6000 which paired fine.  I was thinking about adding on one of my older units I still have to get wifi to the back of my property a EX8000.  Is that possible?  Trying to even set up the 2nd one seems to be confusing my system.  Going through the standard set up it only finds the AX6000.  How to I go about finding the EX8000 to even set it up and is there anything special I need to do in order to have them both on the same network?  Thanks in advance for any help.

[plemans]

You should be able to do so. 

If you're setting them up in mesh, the AX6000 is going to show as the same ssid as the primary router when setup using the installation assistant