Hi. I’d like to install a subwoofer in my son’s car but I have no idea where to plug the rca cables in the Kenwood DNX5140 head unit. There are what looks to be, 3 sets of red/white rca outputs. The 3 sets are labeled as follows.

1. AV OUT
2. REAR/SW
3. FRONT

My first inclination is to use the set that says REAR/SW. Does “SW” stand for subwoofer or something else. Thanks for helping this Dad out!!!