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 Homebrew on Wii Menu 4.3 (with Pictures) - wikiHow
LetterBomb – Dê nova vida à sua Wii com firmware 4.3 - Pplware
Wii – Page 44 – Capsule Computers
New WII with firmware 4.3E; where to start? | GBAtemp.net - The Independent Video Game Community
Turn your Wii into a fantastic emulation machine - Retro & Arcade Gaming - rllmuk