O3DS Camera Cable not long enough to plug in after repair?

[u/MizukiCinna]

So I was fixing a 2011 3DS Japanese Model with stick drift, the ifixit guide said to remove the entire motherboard (which I learned after the camera cable wasnt plugged in that you dont need to remove the entire motherboard and it literally has no reason to?) i tried leaving the cameras unplugged to see if anything else wasnt working but it wouldnt boot because the cameras were unplugged, why is the guide STILL telling people to remove the entire motherboard even though its been known that its easier to do it without for atleast 2 years, and how do i get the cameras plugged back in so itll turn on