I have a Liberty KK that did not originally have the OEM subwoofer. (I don't want to do an aftermarket sub.) I bought a new OEM subwoofer for a reasonable price and and also found the rear quarter body panel with the sub pocket from a scrapyard. I removed the body panel to install assuming from a previous USB port adapter install that the connector for the sub woofer to plug into would be on the uConnect module behind the rear quarter panel. I was wrong. Does anyone with the factory subwoofer know if there is a separate amp involved and how it connects? Maybe a model number I can google with etc. ? Thanks for any help. I have searched and it doesn't look like people have done what I do - or at least have not written about it.