This cable is really fragile, I found it easier to flip the retaining flap then remove all 7 screws in step 42 then gently pull the logic board toward you freeing the SIM board cable.

I did not have to remove any of the three antenna connectors while removing the battery just take your time and you can leave the connectors connected.

Ifixit please make a better quality metal spudger mine took a beating in this process.

I found it easier to remove the 7 screws first in step 42 then gently pull the logic board towards you freeing the SIM board cable.