Check out the head light setup from XTREMEMOTORWORKS
http://www.xtrememotorworks.com
Cyclops Headlight Conversion CC-50-100 $89.00
Get rid of the cyclops look on your tractor. Upgrade kit comes with lights and plate and is a direct hookup and replacement to the original light setup. No drilling, cutting required. Easy to convert back to original OEM if needed.
As far as the wireing the blue is the 12V feed for the lights and the green is the ground.