steering gear box grease

[1968CHEVYC10]

Hey yall, I'm workin on knocking out the thousand little things before she'll drive. And next on the list is greasing up suspension and steering joints. this question is mostly about the steering gear box, I figure that 40 year old grease is about ready to be changed. So I'm aint real sure how to go about doing this, I didn't see any kinda grease nipple anywhere on it. Or maybe I got it all wrong and it's full of oil not grease, either way I like to change it out. If anybody could offer some advice I'd really appreciate it. Thanks Yall!