Given a fairly common smd style usb type C receptacle connector, such as the following: TYPE-C-31-M-12
Two pairs of D+/D- signals are provided, due to the double sided nature of the type c connector. Usually, these are routed as a differential pair to the destination - however, as in the given example, there's two pairs of D+/D- and only one pair of destination pins.
What is the best practice in this scenario? Should the two pairs of digital pins be joined, then routed differentially to the destination?
If the connector is just being used for USB/USB2.0 communications, is routing of the second pair necessary at all? In that case, should those pins be NC, pulled to some potential or otherwise?