My dad brought his work laptop over today (Panasonic Toughbook CF-53), and I saw this port (pic related) on the back. The connector remains exposed, even with the plastic cover clipped on.
It is not marked, and it's next to the RS-232 port, so could it just be a weird serial port or something? I've never seen anything like this until now, what's it for?
I've been thinking its some kind of serial port or maybe even some way to get a better wireless antenna, but apparently he doesn't plug anything into it, so neither of us know.