What is this tube near the shock adjuster?

[jskzes]

I went to go do a rear shock adjustment and I noticed this tube just hanging there not connected to anything. What is it and should I be concerned? I'm attaching pics. Also seeing I'm a big guy (6'5" 320lbs) should I have my shock set to a higher or lower setting?

Attachments:

[nulldevice]

It looks to me like it may be the vent hose for a flooded lead/acid battery. If not, then maybe a drain from the air box. Possibly the vent from the final drive gear box.

[jskzes]

Found out it's the breather tube.