How to check neutral safety switch

Just went through this kind of. Got a new trans and it came with a three pin switch also. Long story short they put in the wrong rooster tail in the trans. Just my .02
That is what i am afraid of.So you should show continuity between the case and center pin when in park or neutral.I do not have that.It does show continuity between the 2 outside pins when in reverse which it should.Just trying to make sure i am checking it correctly.Need to sort this out before putting the trans in