Is there a technique to reconnect the antenna cable?

Hi,

Yes this is a really tricky part to get back on.

I’ve had success by holding it at angle and using a flat screwdriver to gently press it back on to the stud, then rotating the other end very gently back to where it sits at the end of the Taptic Engine.

Be careful not to force the button end onto the stud, you can easily damage the round connector and then it won’t grip.

Bit of a fiddle but it can be done.

Hope this helps

This is for future people who may have this problem. I believe that part is the lower antenna flex cable. I just did the same thing and accidently disattached it while changing the battery.

That flex cable connects underneath the loudspeaker. I found videos explaining how you could remove the loudspeaker without removing the logic board. You only have to loosen and lift the bottom end of the logic board, and then you can wiggle out the loudspeaker.

That exposes the connector for the end of the lower antenna flex cable.