ESG for time Quota different for different categories for a location

Dear Friends,

Please let me know if my understanding is correct or not in below scenerio:

For a particular Location (Personnel subarea), we have different categories of employees such as Regular staff, Contract, Trainees, Expats, etc.

All categoies have different leave entitlement, counting/rounding rules, policy. Initially I gave ESG for time quota field as 1 for all. But I think to split it as 1 for Regular staff, 2 for Contract, 3 for trainees , 4 for Expats and so on to meet all Leave rules standards.

Will there be any impact for doing this activity.?

Need expert advises on it. Hope my understanding is correct as ESG/PSG grouping are backbone of Time Mgmt in SAP HCM.

Regards,

Niladri