I can confirm the cable will tear ... right off if you are not careful!
First time I put the display back in it looked too short, so i retraced my steps and realised it had been folded over. I went through the process again and very carefuly made sure the cable was not pinched but as i moved it to plug it in the cable broke clean in two! :( It must have got pinched pretty hard on my first attempt. These cable ribbons are pretty delicate, certainly more delicate than me!
You live and learn i suppose!