Ok, maybe I can just use loops through the horns.

The problem with connection at the servo end is this: because the interior of the 1/6 scale camel was very congested I could not align the servos appropriately to run pull-pull cables directly off the servo arms unless I put at least one of the servos pretty far back in the fuselage, where it would not be easily accessible for adjustment anyhow.

So I used a method that is sometimes used in larger models - the pull-pull cables are run around spools which are driven by short pushrods from the servos. The spools are positioned to allow symmetrical pull-pull cables for the rudder, and reasonably even cables for the elevator, but they are behind the hatch region where the servos are.