Sending an attachment using Marketplace Adapter

Hi All,

I am working on a project where we are trying to send an encoded attachment using the Marketplace adapter

ABAP Proxy --> xCBL --> MML

The ABAP Proxy will send an encoded base64 string of the PDF attachment.  I would like to understand how the marketplace adapter will handle this? What format to do i need to map into in PI from the ABAP Proxy?

Does xCBL Order have a place holder for the attachment (base64 encoded string)?

Does a module need to be configured to use the attachment functionality on the marketplace adapter?

Thanks much appreciated.