Release : 12.5
Component : MIM
Applies to all mainframe products
The New User Guide for Broadcom Support Portal contains a wealth of information.
Click on item 10 in the table of contents, Working with Broadcom Support, which includes a link to a PDF.
Section 3.5.4 in this PDF includes a link to what you really need, which is the Broadcom Case FTP Help Document
When you scroll down, there is a section
FAQs About Transferring Files Without Using the Broadcom Support Portal
and another section with JCL examples titled
How do I transfer files to or from a mainframe securely?
That last section also includes the z/OS configuration needed for SSL, including the certificate you need from us to run it.
It also includes JCL examples for uploading and downloading the doc.