Rear brake split pin discipline

[PeterBo]

On the attached picture, I show the rear brake drum on my 1929 Model A. You can see the that the emergency brake pins all have split pins but they face the inside of the car and hence are not easily visible. The rear service brake however has split pins that face outwards from the car and although hidden from view, can only fit this way else they interfere with the brake's movement. They therefore are opposite to the emergency, parking brake. In both cases, the pin orientation is as per Les Andrews manual and so I assume this is the way Ford designed them as original. The emergency brake pins could be reversed as far as I can see and then ALL pins would have their split pins facing outwards from the car - a much more uniform approach and allowing checking to be much simpler.

My question is, why would Ford have originally designed the brake movement pins to have this opportunity orientation? Seems odd or an oversight to me.



Any clues?