Hi Glen,
In the context of SPO, you can only manage the inbound Transformation and DTPs with the wizard. You cannot manage the outbound direction. If you have another SPO as target, then you are able to manage it here. Otherwise, you have to manually maintain the Tranformation and DTPs.
Note that you always have to connect the outbound Transformation to the outbound InfoSource. DTPs have to be created from every PartProvider (partition) to the target InfoProvider.
Last but not least, you might want to have a look to my blog series around SPO. Although it is written around implementing the SPO BAdI, I am sure you can find a lot of relevant information. Please start with Pattern-based Partitioning using the SPO BAdI - Part 1: Introduction.
Best regards,
Sander