"failed to pull back the filament from.." - Unscrew?

I’m getting the “failed to pull back filament from the toolhead to AMS …”

I looked at other post on this issue but didn’t find one that told me how to get it apart.

On this page I tried 6 then 5

https://wiki.bambulab.com/en/x1/troubleshooting/broken-filament-anywhere

6 - One possible solution to the AMS single red flashing light problem
5 - Filament may be broken inside the AMS

I choose 6 first as it was easiest to try, no filament sticking out.

I was going to try doing 5 but the video doesn’t mention what tool (Torx, Allen, philips)
Or size to use. I tried to look down and figure it out but really couldn’t tell.

I assume if I can’t this apart I will be able to find the filament causing issue.

Any help appreciated.
Thanks Dennis