Display data cable is loose, how to fix?

My Macbook is displaying horizontal lines that go away if I pull inward on the bottom left side of the lid or position the lid in a certain way. I replaced the display data cable. It worked fine while the display assembly was detached, but the problem persisted once more after reassembly. This leads me to believe that it is a problem of tugging or crimping.

I'm guessing that when I replaced the data cable, I didn't tape down the connection between the cable and the LCD, which is allowing for it to be tugged on by the open lid? Or, the display data cable is being crimped at the hinge?

Any advice? Thanks!