This page explains how to find the Joloo Nah shrine and solve the "Joloo Nah Apparatus" puzzle.
How to Find the Shrine
Be sure to have armor or food that increases heat resistance twice, as well as fireproof elixir.
Float northeast from Wasteland Tower, to an area northeast of Koukot Plateau, where you will find three Gorons in front of a hot plate. Talk to them to get the "Test of Will" shrine quest.
To survive first the test, you can wear the Desert Voe Armor from the Gerudo Secret Club, or eat food that increases heat resistance twice.
To survive the second test, you can drink Fireproof Elixir. Be sure to unequip any wooden weapons, or they will catch fire.
How to Solve the Shrine