Disconnecting a gas stove (New Zealand)

We are having a new gas stove delivered and I consulted a gas fitter to get the old one disconnected (so the delivery people can take it away) and come fit the new one.

The gas fitter surprised me when he said I could disconnect it myself, as there is a safety valve built in that would cut off the flow automatically (should be multi pronged apparently) – but I would need someone to come connect the new appliance (I’ve checked the relevant NZ websites and I can confirm that a gas fitter is required to fit a new appliance, but cant find anything on the legalities of disconnecting an existing appliance).

The problem is, I’m not confident in identifying the valve to disconnect now I’ve pulled the stove out – I think I know which one it is, but I need someone to confirm it please.

This is the connection on the floor to the main gas supply:

That connection looks like it can be twisted and disconnected without issue, so thats my likely candidate.

This is the actual connection at the stove, at the other end of that black pipe:

Nothing there looks easy to disconnect, so I have no likely candidates there.

Am I right in thinking the safety valve is the one in the first picture at the main supply connection?