Venture X Car rental - CDW help

Hi

I rented a car from Enterprise, ran over a stone causing damage to car undercarriage in Yosemite and couldn't drive the car due to weird noises coming from car. Called and paid out of pocket for towing to Fresno airport enterprises location and got an exchange. I had no network in Yosemite so had to ask someone to call towing.

1. How can I claim my out of pocket towing charges.
2. What documents I should request from Enterprise to file the claim with visa cdw coverage?

Any help and guidance is much much appreciated.

Thank you in Advance.