Trying to clean up some of my rigging and need to find an adapter to attach a Merc throttle cable to the throttle arm on a demon. As of now I have a bushing in the big hole on the throttle arm but would like to use the smaller hole because the setup I have now is sloppy feeling.

http://www.cpperformance.com/c-215-t...-brackets.aspx

Is that for the adjustment barrel or for the cable end?

There are a couple different ways to do it depending on what parts you have or want to use.
Hover over the small images for each part and you'll see how they are used.