Huh, I'm surprised to find that neither the Oort Cloud nor Sol have any asteroids defined (those lines are commented out in the mod itself, so this must be intentional). Redrawn Space Connections handles this sort of thing natively, by interpolating asteroids between two locations on any newly created routes, but it relies on the locations themselves having asteroids defined.
While I could just prevent RSC from making any new connections entirely, I really like the Oort Cloud connection to the Solar System Edge (which uses the huge asteroids defined by SSEdge for the route, retaining the intended difficulty), so I've added a patch to prune any other connections made during final-fixes. Implemented in v1.0.17