Top wing mounted.
And there it's going to sit for awhile, because it doesn't have an engine. I was going to try to scratchbuild an RAF 4a for it, but then I remembered I have a source for engines - a guy who has a large supply of old AeroClub white metal engines of all kinds. I emailed him last week, and he told me to call, but I ended up leaving a message. I haven't heard back from him, so I'm going to try to call again tonight. I may start the rigging tomorrow, or I may just put it off until the engine comes and start a new project Friday. We'll see.