If you SES index IH and CS, how do you get the CS indexing to set the location so that picking a CS

I have set up SES and I have indexed PTPORTALREGISTRY (for example) from both out IH and CS databases.   When I search I get results from both applications.  When I pick a result from IH, I'm taken to the location in IH.  When I pick a result from CS, I'm taken to the location in CS.

This is the issue.

We don't want people to go directly into the CS location from the results.  We want the CS result to show up as if it comes from within IH...i.e. with the IH header on the page.

I believe I'm correct when I say that any index created from a particular location is going to take you to that location.  That seems to be the logical explanation based on the behavior.