Is it a must to load bank and bank branches when using HDL to load bank account in expense

Summary:We want to load bank account for all the employees using HDL (we are not HCM customer). Can we reference bank and bank branches we have already in externalbankaccount load or we must create bank and bank branches for every load. Would like to know how best to approach this to not duplicate bank and bank branches. Aside HDL, is there API route we can use to achieve this?

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