Hello, I have a 2009 JK unlimited that did not come with the Factory sound system. I have recently purchased a OEM Navigation stereo and was able to install that just fine with no issues. Currently trying to add the OEM Subwoofer and Amp to upgrade the sound. The Sub Woofer was able to be install just fine plugged in with the wiring harness that was there. Although I was able to find where the OEM amp goes having issues understanding how that plugs in to the factory stock radio and how we would connect that to the battery. I know how that would work on aftermarket amp and can run the wire that are needed not sure how that would connect to the OEM amp does not look like there is a place for it. i have looked online and have not been able to see any videos posted or any instructions on how to add a factory OEM parts when it did not come with it installed. Can anyone help me out.