Lola DIN plug, how to exchange o-ring inside the housing?

[Agro]

ZV Blind-End Plug I use those plugs and like them very, very much. One plug is leaking. It is not the DIN o-ring but the o-ring inside the housing.

Has anybudy an idea how to open the housing?

I once "opened" a Lola plug by destroying it in the lathe. I found no way to open it without destroying. But I also did not realise how it was assembled. It was assembled so there should be a way to diassemble. Or am I wrong?

Thanks for your help.