If you already have Versapay/Solupay configured to use in the NetSuite UI then enabling it on the website it should be fairly easy,
1. Make sure that PROCESS AN ONLINE PAYMENT WITH SALES ORDER CREATION is enabled in you website record.
2. Edit the payment methods that are associated to Solupay Payments processing profile and that you want to accept on the website and check “display in website”.
3. If you are using an external checkout as for example affirm you will also need to select external checkout.
4. Make sure you enter the Payments visuals related to the payment method you are configuring.