Chargent maps the following fields to Cybersource. If you are updating the credentials for your Production Org please make sure you are entering in your credentials for your live gateway account. If you are using test credentials in Production you want to make sure the Test Endpoint box is checked. This allows you to send test data from your Production environment.
Merchant ID: Merchant ID
Merchant Security Key: Merchant Admin Password
Transaction Security Key: Transaction Security Key