Not saying right or wrong, but mine has been this way for 6 years now, with thousands road of miles, and drag racing (bracket racing, where consistency to the .0000x of a second matters) it every weekend, for those six years (a thousand+ times of the pedal being mashed hard from dead stop, and throttle playing -repeatedly letting off and mashing it again- on the big end). Never single issue, ever. The car has been track/class champ, and is currently leading the points this year (always driven to and from the track). It's worked so well since the day of install during build, that I had completely forgotten about it, until seeing this thread.
I used a Lokar 24" braided case cable.
Mounts to carb with supplied fitting/nut.
Used a cheapie autozone universal throttle cable mount to mount the cable too. I just cut off all of the un-needed parts of the mount. I used a total of 8" of the SS braided casing,
The pedal was slightly modified, by using a die grinder with a cut off wheel, to put a thin channel for the throttle cable to pass through. Used the supplied and already fastened Lokar end. Once laid in place, the top of the pedal got a little squeeze to close the gap. After pulling the cable through the ss sleeve, and doing the simple setting of the cable length, the gap that was cut in the pedal, received a good little tack weld. It was simple, it was relatively cheap, and it's been bullet-proof through years of abuse. If the cable ever does need replaced, the die grinder can easily, quickly, and cleanly cut through the tack weld, and simply repeat the process to install new cable itself.