New episode of " What's this Part"

Any ideas on #2 trans mount !


View attachment 1716455743
IDK but maybe a counterweight bolts on the extra bracket? Just guessing.
Found this.
imgurl:https://i.ebayimg.com/00/s/NjY3WDEwMDA=/z/kJwAAOSwIwJZgPIl/$_35.JPG?set_id=8800005007 - Bing