They have holes cut out of them for optional extras.
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*At least* the steering front fogs
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(silver box on the right-hand side of your pic) and EBFD kit have chunks out of the trim, not sure whether TRC or ABS change them as well.
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Also Rev1's have the hole for the brake fluid in a different place as the master cylinder is different.
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Oh, and you're very unlikely to get a 2nd hand one that isn't torn, they're incredibly difficult to get out without removing the crossbrace in the frunk.
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Most people don't bother and they end up torn on the back edge on the right hand side.
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The trim itself is held in with 5 small push clips as well, which you may not get from the
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'bay.
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I gave up in the end and bought one from Toyota
![Brick wall ](*,)](./images/smilies/eusa_wall.gif)