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There might be other uses but I can't think of any.

Well, none that can be said here... 😉
 
Duff-Man says...I always keep my excess power cable wrapped around the clips...keeps things a bit tidier around my desk at work, especially when I have 2 or 3 other laptops there that I am working on....to me it is just another one of those "little things" that Apple does to set them apart from the generic PC manufacturers...oh yeah!
 
They are very useful when you want to chuck the power adapter into your bag. The cable clip means that the adapter is very tidy.
 
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