Those do look quite similar; though for reasons that elude me the ‘flattened’ keying on my units seems to be vastly less common than the ‘notch’ style keying; and threading the shroud of the male connector and putting the connecting nut on the female connector(as in your image) seems to be way more common than a smooth shroud with connecting nut and threaded female connector(as on my connectors).
Truly, low budget Pacific Rim injection moulding works in mysterious ways.
If I can at least find something of the right diameter; and with the threads on the right side, I can probably brute-force the keying, this isn’t the world’s most heroic plastic. I’ll have a look through the variants to see if there is one with the threads on the opposite side.
