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I want to do the same thing. Not sure how it comes apart though. Hopefully someone knows.
I was also concerned about wind noise in that location, wonder how annoying it might be.
Start about in the middle and start pulling up/forward and work to the outside, a trim tool helps, there are just clips that hold it on, I had mine off last week, there is not much to attach a light to under that cover.
I found a photo of one removed from a google search, hopefully you can get an idea of whats under there
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