Take Hite Road just East of the front of the HS off "old" Shelbyville road,
past "the Hut" (looks like old grey WW2 Surplus building).

Take a right just past the soccer field and that will lead you to the parking lot between the "New" indoor practice facility and the baseball field.

Gate is at the top right corner of the parking lot.

Note: If you convert map image to satellite, you can see where the field is off Hite road. The new field house and parking lot are not pictured yet. The "New" driveway to the parking lot/field house runs up the first base side of the field off Hite Road.