How can I access your office if someone is dropping me off from outside the airport with a private car? I don't seem to see the entrance for enterprise car rental. Thank you

I took a tram from terminal inside main airport to parking garage to get my vehicle. Offices in main terminal but vehicles located in off terminal garage. Google to check map of airport to confirm my recollection is correct

Yes take a train to car rentals after collecting luggage from belt, go to the car rental parking lot, they have cars ready with keys in it, pick the car and do renting formalities at check gate while moving out