EDIT: Okay now that I know yellow wire is useless. New question! On the adapter, one wire is solid black but the other has white striping like you'd see in the middle of a road. I tried both for the red and black wires. Both seem to move the fan fine. But which way does it really go? When I googled it someone said the white striped one is Negative but so is black. So would I wire + (red) to the solid black and - (black) to the striped wire? I'm not the best at this and would rather not burn my house down.