Odoo 12 : Accounting module

I did take over a legacy accounting from former system and migrate onto Odoo 12 accounting.

Whilst the bank accounts were created, the appropriate journal was initiated.

Shall I wish to setup the initial balances (or closing balances of the former year), the journal entry I made against the bank account under value date 31.12.N-1, will require a transitory account.

1. JOURNAL ENTRY

ie. Name of the Journal "BANK ABC"

"31.12.17 Bank ABC closing"; Date entry: 31.12.2107; Initial balance: 0.00; Closing balance: 10,000.00; Entry date:31.12.2017; Label: Final balance 2017; Amount: 10,000.00; Result: 10,000.00

2. RECONCILIATION

DT: Bank ABC for 10,000.00

CT: ????? (there I'm stuck)

Or shall I do the opposite? Hence ABC Bank Journal entry as at 31.12 will be -10,000, then recon is going to be: DT: Transitional Asset; CT: Bank ABC and then Journal entry as at 01.01 will be 10,000, then recon is going to be: DT: Bank ABC; CT: Transitional asset?

Bear in mind that no entries were done in Odoo last year, as a result and to start 2018 appropriately, I must capture the initial balance against an entry in 31.12.

Your advice will be much appreciated.