Add these menu links under HRMS / Payroll menu:

Phase 4 Dashboard:
/admin/hrms/phase4_dashboard.php

Increment History:
/admin/hrms/increment_history.php

Arrear Management:
/admin/hrms/arrear_management.php

Overtime Rules:
/admin/hrms/overtime_rules.php

Overtime Entries:
/admin/hrms/overtime_entries.php

Overtime Approval:
/admin/hrms/overtime_approvals.php

Arrear Report:
/admin/hrms/arrear_report.php

Overtime Report:
/admin/hrms/overtime_report.php

Staff Portal Overtime Apply:
/staff/hrms/overtime_apply.php