2015 Tacoma Transmission fluid flow question

I'm adding a trans oil cooler and need to know which port is the feed and which is the return on the radiator. I've looked and haven't gotten any solid answers. Someone posted up pictures of which lines are feed and return on the trans itself, but the words are barely legible on the picture...

 

Typically when installing a cooler you want the fittings going sideways. You want the cooler to fill up from the bottom then up and out. If you have a factory cooler Toyota may have done it that way then follow the lines going into the radiator to answer your question.