When you fit the LCD back be aware that the microphone cable may be hidden between it and the case and make sure it's free. I had to back track a few stages when I couldn't find it.
As said previously, reconnecting the data cable is really difficult and I managed to bend a pin. Thanks to good support from ifixit staff I managed to bend it back - not sure how as it's so small. Unscrewing the IC board is a good idea. If I ever had to do this again I would avoid disconnecting this cable and just move it out of the way, or disconnect it at the other end as previously suggested.
In the photo it appears you're lifting it from its right edge. Sue