The "Maintain Banks" module is found in the Banking section of modules. This module is used to add banks that your dealers use to process their payments. A dealer can have more than one bank affiliation. (Bank ID is automatically added once name is added)
To add a new bank, simply click "New Bank" (pictured below) and enter the requested information - then click save.
When entering new dealers, in order to add the dealers bank as highlighted below, it must first be added to the Maintain Banks module, after which the banks name will appear in the list as an option to select from.