Starter heat shield missing nut??

While working under the car I noticed what looked to be a missing fastener to hold the heat shield to the starter. I took 2 rubber pluming washers with a stainless washer and stainless M5 nyloc nut and snugged it up. I assumed this would be a possible rattle in the future. I have found out the nut was not missing and that the stud just positions the heat shield....just doesn’t make sense to me.
Below is before and after.

 

I would’ve thought the same.

 

You know you wouldn't have these problems if you just stop looking for them.

 

LOL! When you’re right, you’re right!