First hold the monitor firmly between your thumb and forefinger. With a pinching motion grab the connector with the right thumb and forefinger.
Then, this will take a little getting used to, squeeze the connector and while pulling your hands apart. Don’t be afraid, the connectors are sturdy and it might take a little energy. And voila they are separated like below.
In order to reconnect I line up the plug and socket first and then squeeze them back together like so.
That’s it. It will take a little getting used to, but you will get the hang of it in no time.