The first step is to create your new payment method in both Heartland Retail and NetSuite ERP.
In Hyperspace navigate to your Accounting Settings. Using the orange arrow keys, scroll to POS / NetSuite Settings and click on the POS / NetSuite tab.
Click the SYNC DATA FOR SETTINGS button at the top right.
Let this run for 5-10 minutes.
When finished click on the tab for Sales Data Settings
Scroll down until you see a section that looks similar to this.
Click the ADD/EDIT button on the top right.
Associate your new POS payment method to your new NetSuite payment method and click SAVE.