content presenter task-flow for in-context editing

We surface UCM content using content presenter task flows on web pages within a custom WebCenter Portal Framework Application.We have a contribution ucm instance and a consumption ucm instance (i.e, two different repositories for contribution and consumption instance). We would like to know how do we enable the content presenter task flows to connect and update the contribution ucm instance when a user with right privileges goes into the in-context editing mode. By default the content presenter taskflows should fetch content from the consumption ucm instance. Any pointers to make this happen will help!