I have a 2000 Polaris Xplorer 250 4x4 and I was recently cleaning it and noticed a tube on the side that doesn't appear to go to anything. I looked through the manual but was not able to locate a view or description of it. Hoping someone can help. Here are a couple views of it.

 

Welcome to the forums.

First thought is it could be the gas tank vent tube. Most times those are routed through the front by the steering stem.

 

Does the other end come from the battery compartment? Looks like an overflow tube of some kind. Used to have them in battery compartment in case battery leaked acid.