Has a tom tom go 710...? If so, how the fuck do you connect it to your PC to update maps? I got the unit, the mount & the car charger, thats it, no manual or nothing... There is no input for a conventional USB of any size on either the unit or the mount. Googled it & it just comes up with a small>>>large standard USB cable, when there is blatantly no port for that. Please help me, I need help, help is needed. Otherwise I will be lost in Preston for the rest of my life.