Your ApnaComplex portal comes with a petty cash bank account by default – so, there is no need for you to create a Petty Cash bank account again – unless you have deleted or renamed it in the past.
The correct practice is to maintain the Petty Cash as a Bank account in the portal.So, please create one by going to Accounting->Bank Accounts and ‘Add Bank Account’ in case you have deleted/renamed the default one.
All deposits and withdrawals as Cash will be between bank and petty cash accounts as Contra Entries (Fund Transfer entries). You can go to Accounting->Bank Accounts and click on the green icon in actions column to transfer funds from Petty Cash to Bank account and Bank account to Petty Cash.