On a hunch I bought on of these at one of my local OEM's for $20.
Could not wait to get home to void the warranty...
Got it out to the truck in the parking lot and had to open up the shielded part with a BOX knife using it to cut the shield tabs soldered to the mainboard.
Just as I suspected it contained a Mini pci WiFi card.
The antenna cable pigtail (RP SMA on the opposite end) is soldered on.
The antenna itself is black and kinda kool. Needs a magnet on the bottom though. Peeled the Asus logo off the base.