It has always bothered me that Kahr gives no specific lube instructions in their manual. It is a serious shortcoming for any pistol manual to have, in my opinion. ALL of my other pistols have such instructions in their documentation.
In any event, some Kahr owners have got together a put a lube diagram online that has been posted on numerous online forums. In case there are any Kahr owners here that don't have it, here it is:
One helpful thing that it points out is that a Q-Tip can be used to facilitate lubricating a pistol. It actually works out quite well to use.