You need to look in the Manifest files, the dlls and registry keys that are indicated, then test
It could be long
Already tested if by removing the WU service in the ISO, this "option" is still present (I never paid attention but I believe it is present) or remove WU in Live
This could give a clue
Maybe another quicker solution, but I can't remember
What I do, I list all the files of the ISO mounted with the NTLite option (or with this command "dir /s /b>c:\list.txt" in the directory where the ISO is mounted)
Then I delete the component and I relist all the files, and I compare the 2 lists to find out which files were deleted (and also know the Manifests files)