If you want to de-pin it then in each channel you need to use either a safety pin, or narrow flat bladed jewellers screw driver to move a plastic locking tooth away from the pin and withdraw the wire/pin backwards (after you've undone the lock on the wire side of the connector. It's very technique dependent - the more you pull the wire the harder it is to pop the tooth up... you don't need too much force. if you get a 2x or 5x magnifying glass the connector will probably say on it what it is. Maybe an AMP connector.