Hardware Nintendo 3DS XL Touch Screen is pitch black

[AquaX101]

I was taking apart my 3DS XL to replace some buttons, and I noticed once I put it back together my touch screen was black but it would respond to my touches. does anyone know which ribbon cable on the motherboard is responsible for the display of the touch screen, and is there any diagram I could look at of the 3DS XL online to find out? My guess is probably the P9 port but I am unsure. Thank you

 

[Blavla]

flex with 4 wires are the touch
flex with 2 wires are backlight
the big one it the display itself
anyway the touch could not be black. Is something is black(broken) it´s the display