Brooklyn side
n.— «If a righty’s ball hits just to the left of the head pin, that’s called a crossover or, in the vernacular, hitting the Brooklyn side. Why? Bowling originated in the East, and a lot of its jargon came from there, especially New York, said a spokesman for the U.S. Bowling Congress. Going between Brooklyn and Manhattan in the early 1900s was considered a “crossover,” so crossover and Brooklyn became linked over time; a crossover ball was said to have gone to the Brooklyn side.» —“Ask! East side, west side” Rocky Mountain News (Denver, Colorado) Dec. 19, 2006. (source: Double-Tongued Dictionary)
Further reading
Sean in Oneonta, New York, says that when he was growing up in New Jersey, his family would pile in the car and set off on a surprise adventure, whether a short distance or long, and the kids would be told only that they were going on Buxtehude...
Asthenosphere, a geologist’s term for the molten layer beneath the earth’s crust, sparks a journey that stretches all the way from ancient Greece to the author of Uncle Tom’s Cabin. Plus: What the heck is a dogberg? It’s when...
See this.
Makes sense to me.
(I got this from a google of brooklyn side- also where you came up)