Optionally used to connect 2 devices to the OBD (On Board Diagnostics) port. For instance used with Power Vision module in combination with a custom exhaust system that is already connected to the OBD port. This cable allows you to use the Power Vision without disconnecting the exhaust system. MCS vehicle fitment: 11-20 Softail/CVO Softail; 12-17 Dyna; 14-20 FLT/Touring; 14-20 Sportster. (CAN-bus ECM equipped H-D with 6-pin Molex connector)