Direction of flow through ATX cooler?

[HopefulSHO]

Anyone know witch side is the "intake" if you will on the ATX cooler? Time to change some fluid.

Thanks

 

[SHOZ123]

The drivers side of the AUX cooler is going back to the tranny.

 

[Aaron R.]

The best way to tell is on a cold car, start the car and check each line witch ever one gets hot first is the one that comes from the tranny, easy!