In this article, KDE is recommending what looks to be powering OPTO ESC systems from the PM both to the power connector on top of the Pixhawk, and also connecting to the power rail on the back.
This is my setup, which as I understand KDE, is incorrect. This is from the Arducopter Wiki minus the ESC BEC and triple redundancy backups. So, my question is, what IS the correct way to wire up my Pixhawk using OPTO ESC's? Should I splice into the PM and add +/- to the power rail to complete the "loop"? I'm using a Hobby Wing BEC for backup power.
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