TCI outlaw shifter cable routing
wait for someone to chime in on what to use as an insulator to keep it from melting
if I remember correctly some members used 5/8th breather hose, or fuel line
they slid that over the shifter cable and secured it with the little clamps to keep it from sliding
BUT I'm not sure on the size and type of line (I was actually planning on posting a question on this myself since I will be installing a ratchet shifter soon, but this will work just as well)