I'm trying to install a 3" riser on my 800 Mtn cat and it seems my throttle cables are not long enough. I have some of the Powermadd throttle cable extensions but I can't really figure out how they work. The cable from the thumb throttle is routed under the airbox where it splits into 2 cables that go to the carbs. Which ones am I suppose to replace? Or do I need different cables? A little help from someone who has done this before would be a big help. Thanks!