Note 888969 - Move DC to another SC

I would like to refactor our current codebase, and move some DC's from a project-based SC to a global, shared SC. I found note 888969 which describes a technique to accomplish what I'm trying to do.

However, this step has me stumped:

<i>Integrate the activity into the "dev/inactive" workspace of the target SC. (This can be done through the context menu available on an activity in the "Closed Activities" view).</i>

When I try to integrate the activity, I only see the active workspace of the current SC; there's no other workspaces to select. So, what am I missing?

My only thought it that I need to make the 'base' SC a dependency of the source SC in the SLD. Would that then cause the target SC to show up in the integration target list? Or am I missing some other step?