Hard to tell everything from the photos ... does the notch / gear portion stick up above the tunnel? That's pretty obvious and I'm sure you've paid attention to that. You'll have a sharper turn for the cables down by the frame cross bar. If you plan to keep the cables above the frame (and I would suggest you do that mod), just make sure the pulleys are solidly mounted for that reason. Other than that the position you selected seems like a good alternative from what I can tell.