Ref the 2018 Diesel Siverado 3500 pickup box delete truck from an earlier thread, in addition to the rear lighting, trailer connector and rear camera connector, I have a 6 pin connector with three wires and an 16 pin connector with 8 wires in them. Anyone know what these may be for? Tailgate unlock feature is in with the camera connector. I am assuming these are upfitter options. Thanks in advance for any info. Bill