J-Head: GREASE MOTOR TWICE YEARLY. Cool. How?

I bought an approximately 1959 J head from the original owner a few weeks ago. I even received the original manual (dated 1957) with a note (dated '59) from Bridgeport to the company I bought it from indicating this was their manual that was not shipped with the machine.

So when I had the motor cover off to wire up the VFD, I wanted to grease the motor per the instructions on the plate. ...but I didn't see anything obvious on the motor so I searched the internet for a while but didn't find anything useful. I searched this forum and found people asking about general lubrication (points mentioned in the manual) and other heads, or rebuilds of pancake motors. But that the motor cover indicates this should happen twice a year, I assume there's a fitting to pump grease into. The only thing that looks plausible is a hole right on top of the motor (under the cover) in the shaft. It could be a needle fitting but it's pretty big. Before I go putting grease into random locations, I thought I'd ask if someone knew off the top of their head. (And in case you're wondering, the manual definitely does have a lubrication section but does not mention the motor.)

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