Damaged screen cable after botched screen replacement.

Hi first of all this is not my machine and is infact my friends, he smashed the lcd on his MacBook and decided to replace it himself however he damaged one of the cables quite badly, when turned on the computer has image but no backlight so I’m assuming he damaged the backlight cable, if I’m correct how would he approach this problem and can it be fixed because after a quick look online I don’t see how the presumed backlight cable connects to the logic board.

he sent me a picture so I’ll attach that, Thanks in advance for your help.

Image:https://ibb.co/HCrg24m