2019 Volvo S60 Curt T-Connector Vehicle Wiring Harness Trailer Wiring Harness for 2011 Volvo S60; The issue is that the Curt T-Connector Vehicle Wiring Harness # C56224 is not a fit for a 2011 Volvo S60. What you will need to do is install the Upgraded Modulite Vehicle Wiring Harness Kit with 4 Pole Trailer Connector # 119147KIT. This is a hard wire installation that will work with either LED or5/5(2)Category: Custom Fit Vehicle Wiring 2019 Volvo S60 T-One Vehicle Wiring Harness with 4-Pole 2019 Volvo S60 - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Quickly and easily install a 4-way trailer connector on your Volvo S60 with this custom wiring harness. T-One connector plugs directly into existing wiring. Powered ModuLite reduces strain on wiring system.