Agree with PP. You do not need to go to the kiosk. Go directly to the garage, find the aisle with your car class (there’s staff in the garage to point you in the right direction or answer any questions.) Pick a car. Drive to exit booth. Hand over license, cc you used to reserve the car, and the reservation paperwork you printed at home. Booth attendant will ask if you want to prepay gas (we always decline and refill on our own, but your choice). It’s pretty efficient.