How can I integrate a new Payment connector to D365 Commerce POS?

[shaheen8]

Hi all,
I am currently in the process of integrating a new payment connector of a Bank to D365 Commerce POS. I am following the steps mentioned in this document :
[https://learn.microsoft.com/en-us/dynamics365/commerce/dev-itpro/end-to-end-payment-extension]
However, when I add the .dll and enable the breakpoint nothing is getting hit. It means it is not recognizing the External hardware station I created. Can I please know what setups are needed additionally for just triggering the Payment terminal from the pos? (I attached the HardwareStation not w3wp in the debug mode)

I assumed the setups missing are Test connectors information, but when I tried configuring those values, I am facing errors like:

1. A provider's configuration must be valid before it is marked active.
2. To select a default credit card processor, a new credit card payment posting account must be filled in customer parameters.
3. Each credit card type for the processor must specify a payment journal. Set up credit card types before activating the processor.