Put the servos in to the printed servo stands (the thicker end is the bottom). Mark the screw holes on the stand. Drill pilot holes in to the servo stands and attach the servos using the provided screws.

Take two servos and attach the arm servo horns. Align these with the clevis pin/ball links attached to the eyes. This is how your eye is going to move X and Y.

Before actually attaching the eye to the servo, you'll want to "calibrate" the servos. Connect the servos to your arduino board and power source - Yellow connects to a digital input to the arudino board, red (or orange) is positive 5 volts, and black (or brown) is negative and is attached to the negative.

You can use this basic code to find out where 90 degrees is and how far you want the servos to move to get the right effect (Add brackets <> around Servo.h). Once you've figured out how far you want the servos to move back and forth, then you've probably figured out approximately where you need the servos to be glued down. In my case, I had to use cardboard to lift them up a bit.