Different IP addresses modem vs router

thanks again crimpon.

i'm not sure i fully follow (you can probably tell i'm a novice).  here are the points that i think are relevant and what i think i have to do to solve (which i can only try tomorrow as various users are using the network).  would be great if you if you could point out anything relevant, good or bad in my understanding of the situation.

the first diagram below is a simplified version of my current and desired network (simplified to exclude printers, phones, amazon echos, and 2 other satellites).  i want to restructure to the desired setup on the right to simplify, and to improve strength and consistency by increasing ethernet usage and reducing wifi reliance.  I intend to make the changes one step at a time so that when things don't go as expected I know what change / link generated the problem.

The problem i'm having right now is that when i switch the connection of orbi satellite #2 to ethernet, the connection goes directly to the IPS modem even though i have tried to direct it to the Orbi router (via the orbi router's mac address).  The orbi router sub-network doesn't recognize the satellite (& the internet doesn't seem to work when this sateliite is connected directly to the ISP modem). I have read that directing the ethernet connection to the orbi router should be possible but i cannot figure out how to get it to work. 

Perhaps, i need to try rebooting everything?  I also realize that i might need to relocate the orbi router to the basement next to the IPS modem and connect directly from that to the various satellites?

Thanks in advance. - Dominator1