This feature is accessible by adding a new connection, a source step or a destination step that connects to Oracle NetSuite SuiteTalk.
The below page is where you will fill your NetSuite SuiteTalk credentials to establish a connection. This page is accessible by creating a connection in the solution or by creating a connection in the source or destination step.
The below link assists with creating the credentials:
https://docs.oracle.com/en/cloud/saas/netsuite/ns-online-help/section_4381113277.html
Illustrated below is an image of the source step. To add a connection, click on the highlighted icon. The Route field is where you will type out the API and exclude the host.
Please note Page Size in the configuration needs to be blank when querying a single customer, It can be used if you are expecting a list of results.
Below is the link to the API references to use:
https://system.netsuite.com/help/helpcenter/en_US/APIs/REST_API_Browser/record/v1/2021.2/index.html