The cable should thread thru the hole in the end of the rod coming up from the bellcrank where you have a cotter pin currently. You'll need a cable clamp so the throttle crank can slip up the cable when you depress the gas pedal.
... The throttle cable wire should go through a small hole in the accelerator rod and you will need a cable stop (2nd pic) to secure and set the action length of the cable.
Thanks guys. I have a few of those cable stops. I'll see what I can do tomorrow. The pictures have been very helpful.