Trailer Wiring - 2003 XE V6

Have a 2003 Xterra XE V6 with a factory installed trailer hitch, with presumably no factory installed wiring module. Is there any easy method of installing a wiring harness?

You should be able to get a harness from a dealer or they can be found on the internet.

Here is an example.

http://www.xterraparts.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=Xterra&Product_Code=24167-00001

There should be a wire bundle that is attached to the frame in front of the bumper on the passenger side. Just remove the cover and plug in the trailer harness.

It connects here:

http://mywebpages.comcast.net/xterraguy/TowPlug.jpg

I have looked at that location, and either I'm blind or dumb because I don't see any wire bundle as in the picture. What is visible is a closed box with 3 sets of wire bundles coming out and the joining together. I'll try and send a picture later. The manual keeps saying that there could be a bundle [if so equipped]. My only guess is that I have a Xterra not so equipped, but then why would Nissan suply a receiver and no wiring harness?