Refrigerator’s Earthing wire doesn’t have a port

Hello everyone! I'm not sure if this is the right subreddit to post this in. Mods please feel free to take it down if it isn't.

So I recently moved to Japan. I bought a fridge, microwave and a washing machine only to realise that it comes with a separate grounding. This wasn't the norm where I'm from as we had a three pronged plug where the grounding was part of the power plug itself.

Like the picture attached, I cannot find the grounding port. Is it hidden somewhere in this? Do I need to use it (long term)? Can anyone guide me on this?

https://imgur.com/a/40RRLLk

TLDR: Moved to Japan recently, need help setting up a Refrigerator

by wavyhairidiot