Enterprise Rent-A-CAR don't approve of towing in rentals. They have a different franchise for that. I would read your contract. Maybe if you are using your own insurance you may have an out? My first airbag loaner was a Silverado and it had everything but the ball.
https://www.enterprisetrucks.com/tr...s/ThreeQuarterTon4WDPickupTruck-business.html
https://www.enterprisetrucks.com/tr...s/ThreeQuarterTon4WDPickupTruck-business.html