I found this wire behind my radio and do not know what is goes to does anyone know

 

more vehicle info would help get answers, but judging by your switches im going with a 97+ XJ, now not having done any work on that generation im taking a swing in the dark here, but generally speaking yellow connectors are related to the airbags, also another thing to keep in mind is when they manufactured our rigs they went with one harness regardless of what package you had so if you have a lower end model you likely have many random plugs that would have been put to use with higher model addons, which is why you can take a bare bones base model XJ and outfit it to the luxuries of a limited with wrecker parts and its all plug and play 99% of the time.

 

The jeep is a 98 xJ limited

 

It appears in the background that you have another yellow "thingy",...related? If it is part of the air bag system, best be careful as they will fire off if you cross the right wire.