I found it easier to reinstall the brown ribbon cable before the black one.

Remember to tape the button in place when reassembling.

I used these clips when I reattached the gimbal to test everything, before flying. If I had to go through and redo the ribbon cable connections it would have been easy to remove the gimbal with these in place.

BE SURE TO USE NEW RETAINING CLIPS BEFORE FLYING!!!

My camera still wasn't level. I had to use the camera leveling technique found here on iFixit.