There is a 3d barcode on the flap. You know you have the cable oriented correctly when the barcode is facing down and the clip is closed.

Wow! This was so easy to unplug the antenna cables but it took me forever to get them plugged back in. I got it but it took me about 40 mins of positioning and pushing down with the bludger.

I removed it but it was a little tricky getting the ribbon cable back in. I was afraid it would break but it finally seated after a little wiggling.