You can’t do anything to upgrade this keyboard backlight, there is any connection for the backlight on the Logicboard. I was wondering of soldering the backlight ribbon +/- on the Logicboard but where is the controller? no way leave this model without backlight Apple didn’t plan to put a backlight before 2011 model. If they planned to put it on 2010 we would have a place where to solder this backlight +/- power ribbon.