Something fell off during assembly of the enclosure

I was connecting the U.FL to SMA cables and something fell off. Is this something that I can re-attach myself? Is it critical?

Just wanted to make sure before I proceed. I’ve attached a picture of what fell off and what it was connected to.

Just plastic label for the coil if you notice some of them dont have it.

Nothing to be worried about, it was there just for pick&place machine when assembling. Here are topics describing the same problem:

Awesome, thanks for the help.