[reogem]

That appears to be a oil fill plug for the middle gear, part numbers 39 & 40
350 middle gear diag.

 

[reogem]

He probably remembers from when he bought one new for his kid

Truth is I get up at 4:30-5 sit here in our camper, drinking a pot of coffee waiting for the Sun and my Queen to rise. I read some of the worlds horrible news. Then move on to GC for some mental relief.
When I saw the diag RR referred to it seemed to be in the wrong area compared to the pic's.
After this weird form of meditation I plan for the days ride. The real meditation!

 

[reogem]

As you answered the question I didn't have to look, I didn't remember partzilla going back that many decades.
Mental relief? Some might start a tire-oil-machining combination thread to keep you busy.

I don't do the Facebook keyboard warrior thing.