How do I load and reference a plugin on Symbian?

I have a plugin (SQL) which I've created and packaged (as a DLL). I've never really played with custom DLLs before.

I presume I install it with DEPLOY directives in the PRO file? Can it be installed in the default (application-private) directory, or does it need to be installed somewhere else? Is there anything else I need to do in my application to make it available to the Qt SQL driver plugin logic?