"Side win" refers to a small accomplishment or victory that may not be the main goal or outcome, but still brings some positive result or benefit. It highlights a positive outcome obtained as a byproduct of something else. Full definition
There are expected to be numerous appeals beyond this court no matter which side wins. (amlawdaily.typepad.com)
The team with the highest points total get to host the final, and since that rule was made there have been three home sides win the cup! (worldsoccer.com)
Whichever side wins will have a big impact on the carbon cycle and the planet's climate. (newscenter.lbl.gov)