ORIGINAL: mclina
Are you building it as a trike or a taildragger? My first thought was just to flip the servo tray over, and mount the throttle servo on the opposite side of the fuse, but that does conflict with the nose-wheel pushrod if you set it up as a trike.
I just looked at the manual, and it has plenty of pictures of the setup with either a four stroke or a two stroke engine.
It is a tail dragger the way I put it together which I prefer from years ago. The servo tray was already glued in place in this ARF so reversing it might have been a problem.
But the Sullivan cable I bought (see above) should work just great.