No wifi drivers on Windows 7 partition!!

My macbook pro 13" retina display is mid 2014 Yosemite, 10.10.2. I sucessfully downloaded windows 7 Home Premium to a 20gb partition, however i cannot connect to the internet, upon troubleshooting it says i have no "wifi drivers" installed.

I searched for some solutions but then realised that none of the USB's i was using would show up on my windows partition, so there is no chance of me installing the drivers manually. I know windows 7 doesn't support 3.0 flash drives, but I think mine are 2.0 but still don't show up, this is really confusing me (they are formatted as ms dot fat).

Please i'm grateful for any suggestions, thank-you for reading!