How to Install Homebrew on Wii Menu 4.3 (with Pictures) - wikiHow
Wii system software - Wikipedia
After performing a successful connection test on a 4.3U console, this message pops up after agreeing to perform a system update (details in comments) : r/WiiHacks
How To Install USBLoaderGX On Wii 4.3! 2017 Guide! - YouTube
Mod Mii Guide | PDF | Wii | System Software
Instructables.com - Softmod any Wii (Version 1.0 - 4.3)