Fixing my Clara HD backlight?

[kobrick]

I recently replaced a cracked screen on my Clara HD. In the process I accidentally broke the ribbon cable that connects backlight

No problem I thought, as the backlight is just a strip of LEDs that plugs into the motherboard. So I swapped the backlight from my old broken screen over. Unfortunately although it turns on fine and I am able to adjust intensity and color, the screen is not evenly illuminated. Instead of a nice diffuse light it is focused on the bottom of the screen, and the beam of each led is noticeable. So not ideal.

Its not evident to me how it should properly attach or how the original backlight provides such a nice even light.

Any ideas? I'm attaching a photo showing how it looks (a little underexposed to illustrate better).