It looks a lot like this is the same jack as mine GO 950 Live
The connector has 20 connections on the front and 2 on the back.
Since there is a very normal USB cable with a connector, it is not to be expected that more than the 4 that are normally present with the USB.
I'll check the connections to see who goes where.
P.S.
Sure the two on the back are the plus and the minus
P.P.S.
The third and fourth from the left are the two data connections
Pins 1 and 2 are connected together
When I open the associated dock station, the entire connector is molded in rubber.
Again, pins 1 and 2 are bridged for whatever reason and pins 3 and 4 are again the data lines