No, it does not connect to the sub woofer. It connects to the small module that is under the R side speaker. The light on the module will turn from white to blue when it is properly connected via BT.
I use them occasionally for listening to my music on my phone via Bluetooth. It usually works very well, but sometimes the signal will drop for unknown reasons and I have to reconnect my phone. I can honestly say that these speaker sound great for what they are though.