Hangar 9 Alpha Trainer Assembly Manual page 12

Section 4: Installing the Aileron Servo
Step 6
Install an "X" servo arm onto the aileron servo as shown. You
should clip off the shorter arms so they will not interfere with the
control wires. Position the servo arm so it is parallel with the
trailing edge of the wing.
Step 7
Use masking tape to hold the ailerons in their neutral position,
(even with the wings trailing edge). With the aileron servo arm at
neutral (parallel to the trailing edge of the wing), lay the aileron
control wires across the outer most hole and mark the wire with a
felt-tipped pen.
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and Linkages
Step 8
Remove the control wires you just marked and make a 90-degree
("L") bend at the mark. Cut off the excess wire 5/16" past the bend.
Step 9
Install the control wires back onto the horn brackets and slide the
L-bend of the wires into the servo arm. Secure the aileron control
wire L- bends with the wire keepers as shown.
Continued