This part is located inside the Power Inverter -laptop screen, in the middle-bottom of the screen housing. Some inverters will be located in different places, it all depends on the model, and those are rare… like on the rear side of the screen or the side of the screen… but again those are rare, and you will 90% of the time be replacing one located just below the actual display panel. The screen light plug is made in such a way that you can not reverse the plug and accidentally plug it in the wrong way, rather, it will only plug into the inverter the correct way (one port is larger than the other).