Take a look here: VMware KB: Moving the VMware vCenter Server 4.x/5.x/6.0.x SQL database
The KB title talks about version 4/5/6, but inside the KB article, on the right panel you can see that apply to version 2 too.---
Senior Infrastructure Specialist
I saw this but didn't see a reference to older than 4.x.
And as I read it if I don't care about the stats or have any rollup jobs the system DSN is my only place where I make a change after all services are shut down.