My 3320 is a 2007. The only wiring I could find was the 2 wire connector for the back up alarm.I thought it was this connector that I'm pointing to, its up behind my 3rd SCV so I can't easily get it out. But, the wires are different according to the schematic, unless I'm looking in the wrong place.
What year is your 3320? There were changes in 2013, mine a 2012.