All windshields come to the assembly plants with the rear view mirror mount already installed from the w/s manufacturer. This is to standardize the parts. At one time you could get a clear or a tinted w/s. Now they are all tinted. At least that is how Ford does it. Spent 34 1/2 years with them.
2013 Ford F250 SD 6.7L
2014 Wildwood Heritage Glen 282RK
Certified Rumble Strip Tester