There should be 2 pieces of ply about 1/4 wide 1/16 thick and 3/4 to 1 inch long. those are the supplied servo rails for the aileron. epoxy in place to support the servo. Drill the holes and screw the servo in place.

for radio installation... remove all servo arms from the servos. plug them all in the correct channels and then turn on the radio system. Set the rim levers (or computer trims) to centered.

Now you can adjust things.