Add a bank account to your STEL Order. From your profile go to Settings > My company > Bank accounts > New. Enter the format, account number, BIC, name, Description and click Save.
In STEL Order you can add as many accounts as you want and if you want a particular account to appear by default for your transfers, when you set it up, check the "Default"box.
To associate a payment method to a bank account, from your profile go to Settings > Basic settings > Data list > Payment methods, select the one you are interested in or create a new one and check the box Associated to a bank account.
By default, the program has Transfer marked in the payment method, so that it is associated with a bank account.