You can download them from kwikset here. Just choose your version of the lever, select Installation & Troubleshooting instructions from the search list, and scroll down to the .pdf document file listed in the next window.
But that lever is pretty standard, and there are also some kwikset installation directions here
You can use some pretty generic instructions if you just google "install lockset"., that may have some useful pointers.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
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