While I can't speak for that exact model, the ODBII connector is almost always going to be up under the dash, near the steering column. The chassis builder will typically wrap it up with other wires, but the coach builder usually doesn't unwrap and mount it. Sometimes they wrap bundles of wires up against the column with velcro and the OBDII connector is inside that bundle, so look in any velcro wraps if you see them. Basically, unlike a car or light truck where the port is physically mounted to something in a permanent fashion, you're looking for something that was wrapped up out of the way as an afterthought.