your true south is the same as your longitude. The closest satellite to your location is AMC5, which is at 79 degrees west
If you have USALS in your receiver, what you can do is make sure the motor is at 0. Enter your latitude/longitude and tell the motor to move to AMC5 before you install the dish. Then rotate the motor/dish assembly and lock on AMC5. You'll be tracking the arc in no time
I'm at 93.5W and found that if I did it that way (USALS) my signals are higher than
aiming directly at IA6