Didn't your Oculus Quest 2 come with its own cables?
If not I suggest you purchase one from Oculuas Website. I realize it isn't cheap: https://www.oculus.com/accessories/quest-2/
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It is possible the cable you have isn't compatible with the Oculus Quest VR .
EDIT: The Kiwi Link cable you purchased does it mention it is compatible with Oculus Quest 2 headset? I noticed at Amazon there are several 3rd Party Oculus Quest 2 compatible link cables much cheaper than $79.00.
Is this the Kiwi Link Cable you purchased for your Oculus Quest 2 VR set?
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