53 Ford v8 fuel pump rod

[LP]

I have a 53 Ford Customline v8 and took off the fuel pump to clean and inspect it.
I did not notice that the rod was different on each end.
Does the end with the 2 grooves go into the engine?
I do not have a picture of it at this time.
Any help is appreciated

 

[51 MERC-CT]

The end with the long insert goes dowm.

 

[LP]

Thank you very much . I would have guessed wrong. Nice picture of the part too looks just like it