Cusser
+1y
You apparently have a B2600i. For my B2200, the Autozone Duralast lower ball joint DID come with a grease fitting; unfortunately, to use that, I had to notch the truck mount a little bit just to get it to fit, and believe that I did use an angled fitting.
If the B2600i lower ball joint has no grease fittings (as did the stock B2200 ball joints), I wouldn't worry about it, should last 15+ years.