Hi Eric,
You are right that there is no connection when I measure (Ohm) between the LAN plug and the Earth connection on the Delock, but on the others (previous picture) there is null Ohm, so there is earth connection (new picture).
Thanks for the WAGO link, but I meant a thing to mount the round ends of the earth cables together 😀
Have a nice sunday evening
Best KnockKnock