How to add list of values against Work shift Category

Hi There,

We have a requirement to add more values against the Shift—> category. We have already 'work from home' and 'work from office'.

When i checked the values from back end it is showing Lookup type as

ZMM_SR_SHIFT_CATEGORY

But i could not find this in the Manage common lookups or in OTl side also.

From Table:

Thanks,

Joshna.