After moving the wrong black box out of the way, we were able to see the top of the bolt that secures the bracket for the Key Transponder ECU (red arrow). The photo doesn’t really show how deep inside the dash the ECU is. Or how taut that wiring harness is above the bracket. Or how hard it is to press the release button on the electrical connector with my fat fingers. That being said, it’s still a lot easier to deal with the above mentioned problems than it is to remove the entire dashboard to get better access.