V3.60 - how does the new Orion XS feature work?

Had a question on the Orion XS feature “Add option to set a Orion XS to be a common DC-DC converter that takes power from the main battery, rather than its default: charging the main battery with (usually) powered by an alternator.”
Is that suppose to fix: Orion XS not charging - #9 by silvercreek?
I love to know, then I will start pulling a cable to it and testing it.