Exposing extension fields in Opportunity Product for Request Pricing

Hi,

I need details on how to enhance standard "Request Pricing" scenario by for extension fields created in Opportunity --> Product Tab.

The standard "Request Pricing" option works well through SAP PI and pulls the Product Net Price as expected.

Current Standard Scenario used is  "Opportunity with Sales Order Pricing in SAP ERP".

Now, I need to pull additional price details from ECC to C4C. I have created extension fields to pull Discount Price.

In PI, Pricing service response node shows only "Net Price" node for assigning values retrieved from ECC. How can I add our extension field part of this Pricing response structure by enhancing standard scenario?

Thanks

Sridhar