Singer 31k hook timing

[denim2800]

Hello,

I'm trying to adjust the timing of the hook on my Singer 31k32, but I'm unable to find it for this specific machine.

There isn't a screw to untighten (see picture), so I'm a bit lost.

Could anyone guide me where to look?

Thanks in advance!

[Constabulary]

this is from a slightly different machine but the procedure and values are the same for most CB hook machines. Hope this helps.