I first installed MotionEye on one camera and then another. I added the streaming output of the second camera to the first camera's page. The intent was to be able to view all of the cameras on one page. After doing this, I realized it might be better to have one MotionEye server that just displays the output of the other cameras.
Step 1. Set up a MotionEye Server with no Camera
Since all the cameras will be outside and exposed to the Texas heat, I thought it might be better to have a master that has no camera. So, I set up MotionEye on a Raspberry Pi running Raspberry Pi OS ( Part 1: Steps 1.1 through 1.3, 1.5 and 1.7 through 1.9) in one of my racked Raspberry Pis. I am using this server as the Master.
All of the security cameras can be added to and viewed from the Master (Add Another Camera)