Where to spike help

On my center support bearing 24mm nut so I spike it into the existing channel on the bolt or make a new one? Here is a pic of the channel thats on the bolt.

 

Yes, you stake the nut at the groove. Not sure what you mean by making a new one on the bolt? If you are reusing the nut, stake it where it ever it needs to be after torquing & backing off. Don't try to line up the nut where it was originally staked to restake at that spot. Supposed to replace the nut & looks like you did.

 

Yeah its a new nut

 

So I spiked it an assembled it back then just hand tightened the bearing mounting bolts and got in the truck an ran it slowly with the wheels off the ground. Got out an torqued it. Hopefully it found its center position