Under neath the left fender there should have been a white ligth and a bracket bolts with 1/4 – 20 bolts to the 4″ fender support in the rear step area.
These have a BCB liscense plate on them when new.
Apparently since you have an ’06 model new, someone may have hacked yours somewhere. Please have your dealer get with Parts on Monday if your left rear step does not have a plastic mounting bracket and liscense tag light.
We would prefer it to be dealer installed, though if you are distant from your dealer, and want to do it your self, and a pretty good do it yourselfer, we will accomodate your wishes.
BCB