Remember, surfaces that run perfectly orthogonal to the lowpoly surface cannot be displayed on a normalmap. I'm not sure how well those plates will work there.
I think there's a lot of randomness in all the details and nothing that looks like it has a purpose, or is identificable as something that could have a function. It's pretty much all bevels and insets over a lowpoly frame. You should put more time into research and concept (collect related images, steal details, see what…