I couldn't find the hole until I knew where it was. The article in GoMog says you won't find it. Here's a picture of mine. You can see the nipple and grease gun connected on the right, and a bit of the grease coming out of the hole on the left.

[Linked Image]

Paul

73 4/4 "Henry A"
53 +4 Flat Rad "Pug"
84 Citoen 2CV Spec "BeBe"
60 MGA
https://morgan34.org/