Nut orientation on leaf spring front hanger bolt?

[Dakota]

Which side of this nut is supposed to be against the metal on the front hanger for the leaf spring? The side with the slits in it or the side that's solid?   Also, what is the purpose of the slit?   Thanks.

[Chryco Psycho]

flat non slit side goes against the mount
slits could be a locking feature

[Dakota]

Thanks for the quick reply CP. 

[Chryco Psycho]

 

[anlauto]

Nuts go on the inside of the hanger as well. Bolts go in from the outside of the car on both sides.