The source of the conductors... a normal 4-pin phone plug splitter. One you open it up, the part holding the conductors pops out easily.
There _was_ a clip on the top of the plug. I snipped a bit of it off here so that it would fit farther inside the WAN port.
I removed the fourth conductor that would normally go on the +3.3v line. I do not need it, and having it around just makes it more likely that something will get shorted.
The bend shape here is pretty important. You want to make sure that the conductors protrude out enough to touch the board contact, but not enough that they hit the edge of the board and bend away from the contacts.
Back of the connector so you can see the wire order
I just soldered the wires directly on to a few individual headers so that I could plug them in to a breadboard or my some other socket.
The 3 wires going in to my SparkFun FTDI Serial TTL->USB converter
The conductors look like they are on the left side of the connector in this picture. But, the three pads which trying to touch are actually on the right side of the plug. You still need to check these with an ohmmeter to make sure they are not shorted.The connector fits very nicely. You have to be careful with it, but it does not pop out too easily.