To add a storage location:
Go to Inventory → Storage locations in the management console.
Write a storage Name and Address.
Assign Locations to this storage, so that products and ingredients are deducted from it whenever a sale occurs at those specific locations.
Set up rules to direct deductions to the specific storage locations. For example, lemons may be used in the kitchen to prepare salads and in the bar for cocktails.
Following guides might be helpful too: