Those should be in the car audio loom already. You may have to hunt for them. Should be near the white 6 pin. Else you can tap the speed sensor from the PDC, and reverse from the rear lights, but that would only be in extreme cases, such as very early vehicles.

If Navbus and the white 6 way connector are there for the nav, the black one will be too. They wouldn't put one and not the other.