I have the same question.
It seems that the define.xml created from OpenCDISC is missing the ability to add Origin, comments and possibly a couple other items based on other posts. I’m able to add codelist references, but only the first code is showing up in the codelist area at the bottom. However, the bigger question is, how are define.xml files being created that have ORIGIN filled in and linking to the CRF page? Are people post-processing the file from OPENCDISC or using alternative software/self-made solutions to create theirs?