Thanks for sharing. I can easily tell you what both ports do if you can provide more detailed pictures. I need to be able to trace the circuit and then I can tell you what they are used for. If you can give me a hi-res picture of the top and bottom boards I'll be happy to help.
Not sure if it's the same has mine but I also have an Xbox One Prototype but I wasn't able to get into the dashboard. Reading the SDK my model was from 2013 and according to that they stopped calling it Durango and called it Xbox One Beta Kit, maybe this is the same thing.
whoever owns it and cant get it to work. maybe a mix of a retail disk layout and files from the durango alpha kit? http://assemblergames.com/l/threads/durango.62248/ but maybe there are recoverys leaked aswell.