I read through the manual last night.
Picture 46 in the manual says elevator servo: this is really the rudder servo.
Picture 61 shows how the elevator is connected: the traditional way with the
servo in the middle of the fuse and a dowel and two rods coming off of it to connect to
the elevator on each side of the fuse.
The rudders are controlled by two mini servos out on the end of the horizontal stab,
or with one servo in the center moving two wires in guides that route to each rudder.
I'll probably go the one servo, wire guide route to save weight back there.
Page 17 of the manual shows these 'wire guide' alternatives to controlling the flaps and rudders.