Replaced screen. 1st time, 4 ribbon cables but only 3 ports on phone?

Hello I just replaced my screen on my iphone 6 I'm a tech savy person and know I've hooked everything correctly.. However on my new screen replacement with the new LCD and all there is 4 ribbon cords ( which is normal from all directional videos and also the guide I read to do this... My phone only has 3 connectors and so did my original screen... What's going on is it the wrong screen .. Is the actual phone outdated? Please help I'm highly confuse an can't find anything on it