I grabbed a couple of pictures for you.
The 2 bolts circled secure an aluminum angle on the underside. Then the cooler bracket is bolted to the angle.
View attachment 1716207429
Looking up from under. 2 pieces of flat aluminum sandwiches the rad support with a bolt that attaches to the lower trans cooler ledge.
View attachment 1716207431
Looking up from under. Aluminum tube spacer secures the cooler in the vertical position. The bolt runs through the aluminum tube spacer.
View attachment 1716207430
I hope this helps you.