How to create a link on a biller direct screen for downloading a pdf file

Question

Hi,
My requirement is to create link on biller direct screen, when I click on that link a pdf document will be downloaded in local system. I need help on that

Answer 1

contd from previous post, excerpt from BD config guide:
Web Application
3. Displaying the bill document
The Web application displays the bill document.
If the bill document is displayed using a separate Web server (for example,
the Web server of an optical archive), then the URL for displaying the bill details
can be transferred at event 1235 when you create the bill list. The BAdI
FIS_INVOICEDETAIL is not called, but the Web application sends an HTTP
request to this URL. Since the Web application requests the bill data by request
to the Web server for bill details, the Web server does not need to have an
authentication mechanism. SAP delivers an example implementation for
accessing a Web server for bill details.
Connecting Other Billing Applications
As described above, SAP Biller Direct only makes available the display of bills from Sales and
Distribution (SD) in PDF format. If you want to use this function for bills with a different origin,
you need to proceed as follows. See the BAdI documentation for further details.
1. Create an implementation for event 1235. You have to set indicator XXML, XPDF, or
XMULTARCH (or all three) in table T_INVOICES so that a customer is able to load
XML or PDF data in the front end of SAP Biller Direct. Technically, this means you
ensure that the appropriate icons are shown.
2. Implement BAdI FIS_INVOICEDETAIL. This BAdI is called by the front end if the
customer selects the corresponding link. You can determine the required format using
I_INVOICE_FORMATS. Create the corresponding binary data, and fill table T_XML,
T_PDF or T_MULTIPLE_ARCHIVED_DOCS (or all three).
3. Then set indicator XXML, XPDF or XMULTARCH (or all three) in structure
C_INVOICE_FORMATS.
My Questions:
1. My PDFs are stored on a web server as described in step 3, does that mean that I don't need to use the BADI? How are these URLs generated? Does BD automatically know how to retrieve them from archivelink?
2. My documents are insurance bills, not S&D bills. Does that mean that I need to use the BADI as described in "connecting other billing applications"?
To me there is a lot of ambiguity in the way this is described in the configuration guide. Could use some help with the interpretation.