|'Open up a hard disk sata cable'|
What tools did you use to 'open' yout cable?
Do you mean 'remove' the cable from the hard disk? I think this what you meant but your wording is incorrect.
But thank you for the process this may help someone in the future.
Not sure about Gigabyte as i tend to stick with Asus boards, but Asus have an application that allows you to enter bios on the next boot if you have fast boot enabled. In use it often if i am unable to access bios due to fast boot enabled