You might have better luck looking for info on hand tapping a hole. That's really all you'll be doing here. Drill the hole, tap it, and install the grease fitting. They screw right in just like a regular bolt. If you've never used a tap before then here's some tips - put oil on it, cutting oil if you have it but any oil is better than none. Go slow and back the tap out frequently as it begins to bind. About half way through, you may want to pull it out completely and clean the metal chips off it. You don't want to break the tap off in the hole. It's just like dealing with a broken drill bit, it's very hard steel. As you're running the tap in, you won't get much more than 1/4 to 1/2 turn at a time before it starts binding up in the hole and needs to be backed out a little. Backing it out a bit then running it back in clears the chips out of the way and lets it cut some more.