After a little bit of checking configuration of bank module, i have figured out that that part is used for regulation in Spanish banking system. The order of banking information is apperantly different in Spain.
Settings->modules->banking module->setup(right side of the line)
If you try to make some custom modification in php code, it will be helpful since dolibarr do not show IBAN and you may not find field for sub-branch code for bank accounts.
Anyway still it is a great software!
