The cable most likely got reused to install a different HU. The UR's have a different wireing harness than any other T4R. I re-used my cable to splice the new HU cables into.
I upgraded to a Pioneer AVIC Z120BT. Way better looking and sounding.
The TomTom doesn't have the greatest sound quality and the BT volume is not changable(low) and only comes out of one speaker. Can't hear people when driving.
I STRONGLY suggest you don't install the DumDum, even though the nav system is pretty decent, the rest of the unit SUCKS!!!