Ok, so update. Finally got around to replacing cables. The fron is fine, the right/rear still doesn't shift. Is there only one way to feed the cable through the shifter? It doesn't shift at all now. The derailleur does move up and down the cassette as I pull on cable at downtube, so that part works. Just wondering if I am missing something, or the shifter is toast. It clicks, just doesn't shift.

Thanks.