Quarter panel

OK so I received my left hand for 72 diamond quarter panel today. AMD is telling me that the right hand side has been on back order for seven months and is currently being retooled because body lines did not lineup. They are trying to offer me a 72 demon quarter panel, right hand “Skin”
There are some differences but I think I could possibly make it work. The only thing I am confused about is the tab that is on the very back of the full quarter panel is not on the “Skin “ panel. I have enclosed a picture of the tab in which I am talking about. I am kind of confused on what to do at this point.

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