So the four screws in the AV6000 that come in the unit can be safely removed, the unit installed in the bracket, and the screw/washer callout in the instructions inserted in their place. Of course I lost one screw/washer and will have to order more. There's no real callout for the dimensions in enlarging the holes in the F-01202B-1 to allow the big Garmin connector to fit through when routing the forward wires (other than a 1/2" radius) and my enlarged cutout was too small, so I enlarged it until I could get the connector, and all the other forward wires out. I did remove the three connected ring terminals and then reconnect them once that connector was topside.