Assuming you know how to add new system to MA I thought I would share this to help out anyone that is having problems getting it working
After you add the emulator and games directories
Add this to the "Launch"
1) check "show loading screen when launching" (not sure if it make a difference but it works so why not)
2)in the "command line:" use ("C:\Game\cemu\cemu.exe" -g "%file" -f") no parentheses and change the path to you emulator
3)Path to media set it to long
next just add .wud, to your scan media and that's about it
English is my second language so sorry for any misspelling or bad grammar