I found a "how-to" under the RX forum:
Changing the fogs for the LX was similar, primary difference was that each fog light is held in place with two screws instead of one.
Also, I found that the wires were reversed on my fog light harness (this isn't a problem for incadescant lights, but caused the LEDs not to work). I was able to reverse the wires by popping out the green plastic guide inside the connector and then pushing in on the sides of the leads to release each wire. Not quite the same as http://my.is/forums/f221/diy-repinni...ectors-442984/
Not quite plug and play, but not rocket science either.
As an aside, I wonder if all 2013 LX 570's have their fog light connectors wired backwards?