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 Softmod Your Wii (4.3) U/E/K/J : 4 Steps - Instructables
plotseling Mail maandelijks wii themes 4.3 e maximaal Tijdig hek
How to Install the Homebrew Channel on a Nintendo Wii the Easy Way
How to Install the Homebrew Channel on the Wii U (with Pictures)
Instructables.com - Softmod any Wii (Version 1.0 - 4.3)
Wii Homebrew Hack – No Game Discs Required | Hackaday