Neutral safety switch replacement on 74

[slam59]

I am going to replace this switch on my 74 short bed and have read where some say they had to adjust it when they put it on by moving it left to right while foot is on brake and have some one at the rear of truck letting u know when brake lights come on. That way u will know that's the position it needs to be in then u tighten it up. Where as others say it's simply just a put in place and tighten it down no adjusting needed. Which is correct way? Also the one that's on there now shows the two plugs plugged into the switch with no other prongs visible but every one I see online shows 3 other prongs along with the two I need to use. Are those there for if u have other things needing to be plugged in? Thanks for any input.