Gear Question

So i received these crampons with an...

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So i received these crampons with an attachment system i've never seen before. Instead of the metal or plastic straps on the front, they have a non-adjustable, small metal hook in the front of the boot, which looks like you are supposed to slide into your boot? I own the nepals, and no such hole to slide this hook into exists on those boots, so i am not sure what to do or how these work. A picture of these crampons with an example of this system can be found on the amazon page for these crampons. Anyone have any ideas?

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This is the gsb system and is only used with Scarpa boots