I purchased this panasonic toughbook fz-55 mark 2 on ebay. I have been a long time dell roughbook user (3 generations, still have 7414), and all those machines had the GPS built in and worked flawlessly. Am a USCG merchant marine and do lots of boat work, and deliveries.
It has this double round connector on the back that I am pretty sure connects to the dock, and allows one to have an external antenna in the vehicle.
Blue and red wires connect to it. The toughbook has the Sierra Wireless EM7511 Qualcom Snapdragon X16 LTE-A in it shown in the attached picture, and device manager shows a NMEA port 19 on the Sierra unit. Putty sees that port and GPS data is being read, although its mostly empty due to no GPS antenna.
I have an external GPS bluetooth unit, with a usb cable and it works fine. I have searched on the web for information on this unite. Sounds like a need to buy and internal antenna setup, connect into those two spots on that daughterboard. Then route wire and antenna likely up into the display.
Looking for where to get the antenna assembly, and maybe instructions on how to install it.