Hoses on bottom of battery tray???
 

I replaced my headlights today with some newer bulbs. In order to do the driver side I removed the battery and the battery tray. There were two hoses attached to the tray. One was a drain, the other was attached to the charcoal canister and it had a 2 wire plug attached to it as well. Any idea what the hose and plug are for?

part of the evap system or for cruise control.

In the battery tray??? I thought a vacuum port connected to my kids 94 4runner power steering system was weird....