AX 2012 R2 Retail POS - manual credit card entry using pay card action?

Hello,

We want to add a "manual credit card payment" button as a payment option on the retail POS.  We are using a 3rd party payment processor so we can modify the EFT service using the Retail SDK.

I cannot set the action of the button to "Pay Card" as this will follow the current process of paying using a credit card.  I am not familiar with how the process gets to the EFT service so i can re-use functionality.

Any advice on how to get by this hump is greatly appreciated.

thanks!