Mercury - CAN Data Harness (10-Pin, No Resistors, Non-DTS) 10-Foot SmartCraft Lead 84-879968T10. Overview. Some helm layouts need a clean SmartCraft extension with just a little more reach-and this harness is built exactly for that. The Mercury 84-879968T10 CAN Data Harness provides ten feet of non-terminated SmartCraft cable using the blue 10-pin connector, giving CAN P networks the space they need without adding unnecessary complexity. It also includes leads for the horn and Link Gauge, keepin