I believe the positive battery cable actually ran along the top of the frame, next to the fuel return pipe, on at least some cars. I just did a frame off and didn't run mine that way though, I just ran it over the trailing arm and then back to the starter. Just make sure it's not going to get pinched in the TA joint and keep it away from the exhaust. There should have also been a black clip that pop into a hole on the frame to hold one of the positive cables.