Hello there,
Please contact our Customer Support and they can take a look at it.
https://help.corsair.com/hc/en-us/requests/new
Best regards,
CORSAIR Johan
Do you have the exact model of motherboard? Also the manual for your motherboard should have all the info where the front audio cable and everything else should go.
Im sorry you are experiencing this, I would recommend you to create a ticket with out support and they can take a look at it.
https://help.corsair.com/hc/en-us/requests/new
I would recommend you to contact our support, they might be able to help you out faster than the retailer.
https://help.corsair.com/hc/en-us/requests/new