Unused IO of the UpCore in the px4vision kit

I have purchased a px4vision kit and would like to use all of the IO available on the UpCore sbc that the platform is built with. There are already a number of IO interfaces broken out for developers to use. However, there seems to be a couple which are not provided, at least not in an obvious manner.

There are supposedly 2x USBHSIC and a usb2.0 interface which is exposed through the 100 pin connector. Also, there is supposed to be an Ethernet connection as well through this connector. Are these also exposed through the holybro carrier board to the developer?

Attached is an image I took of the top side of the carrier board, where there is an unmarked header. Any ideas on what this might be?