In any case, your model is built, which means you have two choices. You can leave the wings as they are, or you can rip them off, glue them back on, and try to get the paint job as good as it is now.
So one factor is how happy you are with the finish. If it's good, it's a shame to ruin it. If not, it might do no harm to try again.
Next, the Octurion isn't a canonical ship, Mongoose no longer support B5:ACTA, so there is no official way for how the ship should look. Your ship is as "realistic" as anyone else's. Based on the various replies here, the wings may be angled up, down or level, and probably are depending on whose model you look at.
It's your model, you're the one who will be looking at it most of the time. If you're happy with the way it looks, leave it like that.