Version 1.6.0 does not modify the game's version number for the Wii U version. The latest Wii U patch remains 1.5.0. Therefore, the "160 update link" is exclusively for Nintendo Switch users and emulation of the Switch version.
The Ancient Trial of the Elements can be accessed through a new icon on the game's map, which will appear after players have completed a certain number of shrines and have a minimum amount of hearts and stamina.
// SYSTEM UPDATE v.160 // STABLE LINK TO ZELDA // ESTABLISHING...
Players often discuss these updates in the context of load times and performance enhancements:
