About where you have it would be OK. Subsonically the ac of the stab is 25% of the mac. If your mac is correct then something a few percent ahead of the 25% point would allow the stab to be stable and not load up the servo too much.

Aft of the 25% point would make the loads unstable and make it difficult to achieve a setting - the stab would go from one tolerance extreme to another.

Too far forward of the 25% point would really be stable and the servo loads would be extremely high - not good.

The exact number of percent ahead of 25 with model servos in mind would be 2 or 3 percent as a starting place. The fuselage will have some effect, etc. I would look at an airplane successfully flying and not tearing up servos and copy his location.