Ground on top horizontal, low beam feed on left vertical, high beam feed on right vertical: low beams will work normally, high beams will be in series with low beams. Result: dim, brown, poorly-focused light.
Ground on top horizontal, high beam feed on left vertical, low beam feed on right vertical: You'll have low beams with the kickswitch in the high beam position. With the kickswitch in the low beam position, lows + highs will be in series. Result: dim, brown, poorly-focused light.
Ground on left vertical, low beam feed on top horizontal, high beam feed on right vertical: everything works correctly.