Stick the screw driver (if you can) between the two ridges and push the piece into the hollow metal body so that you can pull the links apart. Although it is not shown, when in place, the pin will stick out the right side as well.
Stick the screw driver (if you can) between the two ridges and push the piece into the hollow metal body so that you can pull the links apart. Although it is not shown, when in place, the pin will stick out the right side as well.
in this box: