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.

@bkzshabbaz
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.