You want the power connector in the green board which says “Maslow” on it. When you plug in the power a light next to the connector should come on indicating that you have power
I really need to update those pictures. You want to use the same connectors indicated in the picture and ignore the 4th one
The bottom board flashes when it is active, that is normal and good.
This is probably related to the above, but if you haven’t done so already it is important to install the firmware and then connect Ground Control to the Arduino by clicking Actions → Ports and choosing the same port you used when installing the firmware
Thanks everyone. I did have it connected properly, based on your comments. I ended up starting from the beginning and it worked. I with I could write what the issue was, but it magically worked.