1928 Tudor headlight wiring

[joesplas]

I am rewiring my 28 model A Tudor. It is a single bulb headlight system. I purchased a wire harness from Snyder's so it is color coded correctly. My issue is the wires coming out of the headlights are not color coded. Someone just used red and yellow wire on the headlights. I assume both bulb filaments are supposed to come on for high beam but I am unsure which filament is to come on for low beam. I tried both filaments and my wife and myself differ on which single filament we think is brighter than the other. Maybe it doesn't matter but would like to have it working correctly. Also I do not know what is supposed to come on with each position of the light switch in the center of the steering wheel. It appears to me with the handle straight down everything is to be off. I can move it one notch towards the drivers door and it appears low beam lights come on. Then if I move it one notch towards passenger side also it looks as if low beams come on and 2 notches towards the passenger side the high beams come on. So my question there is why would the low beams come on with one notch to the left or right from bottom position. I do not have the tail lights connected yet so does one position verses the other have something to do with the tail lights of am I not seeing something correctly. I should add the car does not have cowl lights. Please provide me with any guidance you can.

Thank you
Joe