It plugs into the OBD port (at your left knee under the dash of the Maverick) and the dash cam plugs into the USB plug on the adapter.
My dash cam was placed just behind the rear view mirror, in fact I am currently in my truck on I70 driving to Kansas as we "speak".
This is what I use:
https://a.co/d/0a0kTBl1
On my VIOFO Dash Cam A119 Mini 2 with the adapter set in the -O- position.
It starts recording automatically when I start it or with the Ford Pass application (I can even ask Alexa to start it for me) and it continues to record for an additional 20...