lower ball joints

my passenger side ball joint is shot so i orderd new front control arm assemblies from jegs and i noticed that the ball joint doesn't have a grease fitting. i was wondering if i could just drill and tap a grease fitting on them or does it not have one for a reason?

If it doesnt have a zerk fiting then it must not need one. It wouldnt do any good to drill and tap it.

ok thank you for the response..