LCD Installation Walkthrough

[nielsnuebel]

Ok this is probably a very stupid question but this is my first time using electronics of this fashion.  It's fairly obvious what orientation the cable needs to be inserted on both ends (metal meeting metal) but when I try to plug it in it refuses.  Not sure if it is just a very tight fit or if I am missing something.  Is the black piece at the end of each plastic connector a lock mechanism that needs to be removed or lifted before the cable can be plugged in?

You have to lift up the black piece and then insert the cable and lock the black piece again. 

Photo by @edinor