I am going to return a Hertz car to Atocha rail station in Madrid.

Does anyone know if they have a parking area for rentals, what street Hertz is off of (I see counter is in the AVE area of the station), or suggestion on returning. It will be a Sunday morning, so traffic should be a bit lighter.

I know the station is quite large, and would like to know more exactly where I need to go to return car.

Thanks.