I purchased a wiring kit for my 2003 2dr 4x4 Tracker ZR2 2.0L automatic.
 
The instructions state that the 6-pin wiring connector that I plug the kit into is just forward of the jack compartment in the left rear of the vehicle. I am to supposedly remove the jack and locate the wire bundle going to the tail lights. No problem there.
 
However, I can see no connector since everything is packed so tightly and I can see no reasonable way to 1) find out if the conector even exists and 2) access the area ahead of the jack compartment to work on it.
 
An adjustable multi-directional mirror has been no help in locating the connector. It appears that I would need to take a giant can-opener to either the back fender area or to the plastic lining which constitutes the inside of the vehicle.
 
Does anyone have experience with this who could explain how to solve this?

It's not that difficult. Just simply remove the left (US. drivers side) cargo area speaker cover panel thingy and it'll be stearing you in the face. In installed one a few years ago. I can take a few pix of exactly what needs to be done in the mornig for ya if you'd like.

It's ridiculously easy. 
Pulling the panel isn't bad as long as you take your time. The plug is right there.
Installing the hitch is is easy too. Four bolts and you're good to go.

I've hidden the harness behind the jack. It hides very easily when not in use. Can't see it at all, takes up no cargo space.

Yeah ill take a pic u can get the connector for like 20 bones plug it in and ur done