bagginsbill,

Don't know if you plan to make one centered eye, or a left and right. I case it is the latter, you will want to know the origins (joint centers) of the eyes.

Left

    origin 0.0133967 0.6538385 0.0184297

Right

    origin -0.0133967 0.6538385 0.0184297

The above read as x, y, z, respectively. Note that the eyes should be orientated to point outwards towards the side of the head by 5 degrees, so the left is  5.0°, and the right -5.0° on the y axis.