Having recently completed a flight instructor's rating at a respected school the following is what I was taught to teach. Note the methods I have been taught down the years vary somewhat, so this is not the only way.
Initial aiming point is 1/3 down the field. From this extends a short final, then from the projected start of final extends a long base at 90 degrees in the appropriate direction (left hand if possible if you are in the left seat) to a 1000-foot point ("low key" in the military parlance). Fly to be at this point at 1000' agl, using a spiral circuit from "high key" if you like or any planned route (monitor as you fly).
From the 1000-foot point you are aiming to fly base and final to land 1/3 in, the long base allows a lot of adjustment. When you are certain you are going to land 1/3 of the way in select first stage flap, aim 1/4 of the way in. When you are certain you will make 1/4 in select next stage and aim 1/8 in. When you are certain you will make 1/8 in select full flap and aim for the "threshold".
I have never heard of anyone advising aiming 2/3 of the way in.
If you prefer tell your examiner before the trip how you will fly the PFL, as it is how you have been taught. As it is a recognised technique he should accept this.
Best of luck!