That makes sense. The slot on mine is 7" long, so the bracket will fit either way, tab towards firewall or towards steering wheel. So how did the factory set the position of the column? I would think the tab was a locator, but it appears not.
So...as it happens I have a steering column here from a '65 or '66 Dart that had a manual steering box and automatic on the column. It only has one slot that is 1" long. The directional wiring comes out on the left side.