Please read this:
this for OC1.5 but for OC3.0 very similar.
Take a look to the attached screenshot and you'll understand what to do.
clone-bank-transfer.jpg (230.5 KiB) Viewed 229 times
To add multiple banks payment transfer method you can use this extension:
https://www.opencart.com/index.php?rout ... date_added
And if you want to create your own custom payment method then may look at this:
https://code.tutsplus.com/tutorials/cre ... -cms-22393
Opencart Expert | sales[at]ost.agency
Skype - manish.osuniverse | Gtalk - manishmt
Extensions for Opencart @ https://www.ost.agency/product/product- ... extensions
ost.agency - ecommerce website design, development and digital company
just click right mouse button and on popup window click open image in new tab.