Is there a manual way to adjust carryover for leave accruals?

Good morning

We have a need to adjust the carryover bucket for one of our leave plans for certain employees.  Without going into too many details, we don't want to store the adjustment in the actual adjustment field, we need it to be in the carryover field.  Any change that comes through payroll will hit the adjustment.  Does anyone know of a way to modify the carryover amount without using the adjustment field?

Thanks!