I'm about to submit images for about 20 Switch games and would like some advice to ensure quality

[Clutz450]

I have about 20 Nintendo Switch games and I just recently finished scanning both the inside and outside of the full cover as well as the front and back of the cartridge.  I am not a photo editor at all and I was wondering if someone would be able to help me with what I assume would be something very simple.  On my front an back cart scans, I don't know how to remove the blank space in the corners to turn them transparent.  It's very minor as I did my best to ensure the cart images filled as much of the screen as possible, but still I would like the quality of my submissions to be a correct as possible.  Also, if you look at my full box cover scan of Bluey, you will see that there is a small crease that can be seen in the middle of the spine that I would like to fix but again I do not know how.

Speaking of the full box scans, I did both the full outside of the box as well as the full inside of the box (what you see when you open up the case).  Obviously, I will tag the full outside box scan as "Unassigned Images --> Box Full".  But what should I tag the inside scan as?  I'm leaning towards tagging it as "Background Images --> Fanart - Background".  However, that is not entirely correct as it is an actual scan from the box and not Fanart, but in my opinion is the most "correct" based on how LaunchBox would use this image to display it.

Lastly, I also scanned any inserts that were inside of the box.  Some of them are advertisements for toys or the TV show (in the case of Bluey), and others were cards that had DLC codes on them (I was able to remove the code in Paint which looks ok but if you look closely you can tell that I removed it).  Again, these images don't really have a proper category but I am leaning towards adding them to "Box Front Images --> Advertisement Flyer - Front" and "Box Back Images --> Advertisement Flyer - Back" respectively.  

Please take a look at the scans I attached as examples of what I am talking about and if you have any advice either for or against my plans on how I plan on submitting them.  Thank you.

Edit: It turns how that me trying to attach the images errors out.  Maybe because my file sizes are too big.  I uploaded them to my Google Drive and linked to them instead.  Hopefully this works.  Thanks.  (https://drive.google.com/drive/folders/1hFhCHhlVWnOOi9lsgxKXl1umSimcDw3m?usp=sharing)