We're in the process of upgrading from Hybris 5.7 to 1808.5. We had a customized version of marketing integrations for commerce running on our 5.7 implementation even though it wasn't officially supported. We took the earliest version of commerce integrations for marketing and downgraded them to work in 5.7, so there was a lot of custom code.
We're trying to get as close to OOB as possible with the 1808 implementation but there may be a few cases where we need to customize and add to the payload that is sent to our instance of Marketing Cloud.
In our previous implementation we had specific service and job files that handled all of this, but in the OOB version of sapymktsync we do not see any source files or files of any kind that reference AbandonedCside from an impex file that contains details for ymktAbandonedCartsToDatahubJob.
It seems like out of the box we can simply use this job in a CronJob to send the OOB implementation to Marketing Cloud, but we're unsure of what to do to extend functionality since there is no source provided. Can anyone advise us on where to look? I was unable to find any direction on this using help.hybris.com documentation.