Shintaro decided he wanted to add wi-fi to his Zero. Rather than mess about with converter cables and adapters, he has instead taken apart the dongle and soldered it directly to the correct lines on the Pi. He carefully kept the two USB data line wires the same length to avoid messing up the signal and then wrapped the whole thing in clear insulation. You can see from the picture above what he did to the dongle (which is an Edimax). Using the raw 5V output from the power supply can be a bit dodgy, so caution is advised.