Trying to update OS for Macbook air 2013. Issue with downloading correct OpenCore for this Macbook from another Mac

Hi, really need help on this one. I've tried multiple times. The Macbook that is a problem will not connect to the internet. Therefore, I need a bootable USB to created that has not only the OS but also OpenCore to be created from my other machine however I have not figured out how to get the configurator set to the correct Model as when it downloads it auto detects the Mac I'm using and that is not the correct Mac. The Macbook in question a Macbook Air 6,2 with 4 GB memory. Appreciate any/all advise. Thank you