Since I was trying to do this and no one posted the answer. You only need the green from the switch wires, hook it to a 10a aux switch. Black circle to battery negative, yellow circle to battery positive.
I got an email saying they are looking to change the build date to the week of 5/19 but I haven't got a VIN still and this is the first build date I have gotten.
But you are going to have to run thick power cables to the back of your Bronco to do any of these right. There are also mounts for under the trunk which seems like it would be difficult if you have stuff in the trunk or the slide out tailgate. All of these seem much more involved an install...