Neutral Safety Switch, 1 or 3 prong?

I've interchanged the long and short switches with no issue. In fact the only difference I've seen in them is the plug is a little different. My apologies for not telling you the outer terminals of the switch are for reverse only. The middle pin is the one you should be using for the neutral start. You can completely ignore the outer terminals cause as Gaz mentioned your car has the reverse light switch by the shifter.