Do you mean this piece?? See photo in this thread?
https://pinside.com/pinball/forum/topic/77-bally-saucer-problem#post-22940
Bally has two of these style ejects. One is left... the other is right... it matters.
I also posted a Bally Parts guide from this year.
Check out page 59.
I'm not sure how this link will post, so here's a link to my webpage... it's on the very bottom.
https://sites.google.com/site/pinballfaz/
faz