Pinout of a PCB-mounted USB "B" Receptacle

Step one of making an Arduino impersonate other USB devices is to wire-up a USB "B" receptacle so you can attach it to the Arduino's 5V, Ground, and three digital outputs.  Finding the pinout of the receptacle is easy -- but I had to get out the multimeter to discover how that passes through to the bottom side of the thing.  I *think* I've got it...