CARC - bolt missing?

I noticed an empty thread on my Griso swing arm. Looking from the reverse side there are two bolts top and bottom and in between these there is an empty thread.

I have a photo but not sure how to upload.

It would be appreciated if someone could let me know if there should be a bolt in here.


You can either rest easy or we both need to worry as mine is exactly the same!!

You’d think they could put a plastic blanking plug in or something if it’s not meant to be used.

Thanks for the reply.

I had a strap wrap around my back wheel and damage the speedo sensor, so I had though it may have also taken out whatever should have been there.
So all is good, I just have to install a new speedo sensor now, which I know how to do as a previous one died due to water.