Additional RBS 750 satellite won't connect to RBR 750 Router

Gents, 

Thanks so much for the assist. Talk about Netgear creating a nightmare to add additional equipment after the fact if the firmware doesn't match. 

The original means of trying to do it with the static IP address all initially failed. I ended up doing the following. 

1. Plugging it directly back into the original router.

2. Find it on the attached devices, take its IP address, and input

   it into the browser. 
3. It took me to the satellite's standalone Orbi webpage, where I was able to manually update the firmware
4. Once all of that was done and a power cycle, it showed up as a satellite and then was able to add it to the router network finally. 

Appreciate all the help with this!