knock sensor plug pigtail

[Regulus]

The knock sensor plug pigtail looks to be disintegrating.
I have only done a general visual inspection of everything I can see in the engine room while I have removed all the plastic covers.
But from what I understand looking through old threads where MJ shows photos and comments, it is something better left untouched?
I looked at one of your photos MJ, with the manifold removed. No way I can get to that.

By the way, I do not have two green knock sensors, but one green and one orange.

*I hope I use the correct words for the parts. I could find knock sensor cables in online shops, but not the plug pigtail*