Cordova Development - iOS iTunesArtwork in ad hoc distribution

As how everyone explained around the internet, you need files named "iTunesArtwork" (512px X 512px) & "iTunesArtwork@2x" (1024px X 1024px).

iTunesArtwork - 512 x 512
iTunesArtwork@2x - 1024 x 1024

And they must be filename without extension.
If your image file is iTunesArtwork.png then name it to iTunesArtwork (without the ".png").

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Once you have your artwork ready, rebuild your iOS Cordova build.

cordova run ios 

After then, the generated app (applicaiton) file:

generated-app.app (in /mobile_app_root/platforms/ios/build/device/generated-app.app directory)

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right click on the generated-app.app and select "Show Package Contents"

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After you click [Show Package Contents], it will direct you into a new directory.
This is the directory where you should place your iTunesArtwork & iTunesArtwork@2x files.

In root folder, is where you place your  iTunesArtwork & iTunesArtwork@2x files.

using the manual way, compress method to get your ipa build.

Try it in iTunes app, you'll see the result.


References:
Customizing the App
iTunesArtwork And Xcode