What does this connector mean?

Dear all,

I have found a module with a connector as follows and I would like to know several things:

What does it mean, how does it work?
How do I put it on and take it off?

Thank you very much in advance and best regards,

  • it looks like a graphical arrangement of a link turning to the right, too much near of a link turning to the left.
    to "remove it " I think you just have to move the connector a little bit to the right ( or left)