Power Steering Leak after Track Day

[Shred]

Hi,
After a good track day, my 2003 Boxster S developed a power steering leak after roughly 2 hours of street driving.

Parked in the garage, switched on the car, big growling noise which changes with the turning of the steering wheel. I turned the car off straight away and can see fluid under the car engine area, on the undertray etc.

From my researches, it is possibly the return line of power steering reservoir which overheated and started to leak.

Anyone have ideas where to check for this leak?

I read it is essential to have a Power Steering Cooler on the 986 to 987.1 cars.
Anyone here have one installed and which?

Any ideas is highly appreciated.
Thanks