Dan's absolutely right!
Meanwhile, I have a slightly more random approach to throttle cables. I just bought a stock classic iron engine Bullet item. I then fitted a 90 degree bend ferrule to the carb top so as to direct it away from the underside of the gas tank, and simply trimmed the now over-length outer cable to suit. This was on a Dell'Orto PHF but ought to work on the TM32 Mikuni, especially as this is quite a tall carb, and room under the tank is limited.
Regards,
Adrian