The picture Ray is showing was the second device team f0f describes in their 30c3 presentation.
I see the words ghetto ftdi which is likely an ftdi usb to serial TTL converter.
Apparantly, marcan had some code that made interfacing usb2serial possible. It allows bidirectional communication to the wiiu. (ghettohci)
The wiiu adapter was connected to another usb 2 serial ttl adapter to provide the pc serial port.
Only 3 wires are used, likely RXD TXD and GND.
The goodfet adapter is an usb 2 Jtag adapter known to google as well.. I think they only use the ftdi chip in it to use it as an usb 2 serial bridge. (That's why they have the thin wires soldered to the board) (He probably didn't had 2 ghetto ftdi boards lying around, that's my guess, or the wiiu code couldn't handle the ghetto ftdi chip)
The third method Team f0f used for communication was an usb gecko connected to some unused wiiu gpio lines.
There exist pictures of that setup as well. You have to emulate the gamecube EXI bus with these gpio lines in software to get that setup running, and you need an usb gecko.
Apparently, this method has a much bigger transfer rate. (Against 115200 baud for setup 2 in the picture Ray is showing.)
The disadvantage of method 3 is the fact that you have to solder the wires in your wiiu which will void it's warranty.
I see the words ghetto ftdi which is likely an ftdi usb to serial TTL converter.
Apparantly, marcan had some code that made interfacing usb2serial possible. It allows bidirectional communication to the wiiu. (ghettohci)
The wiiu adapter was connected to another usb 2 serial ttl adapter to provide the pc serial port.
Only 3 wires are used, likely RXD TXD and GND.
The goodfet adapter is an usb 2 Jtag adapter known to google as well.. I think they only use the ftdi chip in it to use it as an usb 2 serial bridge. (That's why they have the thin wires soldered to the board) (He probably didn't had 2 ghetto ftdi boards lying around, that's my guess, or the wiiu code couldn't handle the ghetto ftdi chip)
The third method Team f0f used for communication was an usb gecko connected to some unused wiiu gpio lines.
There exist pictures of that setup as well. You have to emulate the gamecube EXI bus with these gpio lines in software to get that setup running, and you need an usb gecko.
Apparently, this method has a much bigger transfer rate. (Against 115200 baud for setup 2 in the picture Ray is showing.)
The disadvantage of method 3 is the fact that you have to solder the wires in your wiiu which will void it's warranty.