Can a charger pack applied to the wrong terminals cause damage to a starter motor on a car. This was done resulting in a loud bang, flash and smoke inside the vehicle. What other damage could have been caused.
I suppose it could damage the starter, but it's more likely that you're going to have issues with all the onboard electronics. Modern cars are full of mini computer systems that don't like improper voltage. With smoke coming out, something has certainly blown up, and the car needs a thorough going over by someone that's an automotive electrical expert.