Correct place to maintain supplier lead time for an Item in an Organization

Summary:

Which is the correct place in Oracle cloud to maintain the Supplier Lead times for an item in an organization? Should it be in item master in below highlighted fields? Or should it be loaded through the FBDI 'ScmApprovedSupplierListImportTemplate'? Please check the screenshots below. Client has low shelf life items so, plan should not suggest planned orders too early before the demands. We were suggested an advisor to remove the lead times from item master and put it into the Planning via FBDI to get correct dates for the Planned Orders being pegged to Demands. But I cannot find a