Mercury - CAN Data Harness (10-Pin, No Resistors, Non-DTS) 15-Foot SmartCraft Lead 84-879968T15. Overview. Some SmartCraft installations need a simple, no-frills extension to reach across a wider helm or longer routing path. The Mercury 84-879968T15 CAN Data Harness provides fifteen feet of clean, non-terminated SmartCraft cable using the blue 10-pin connector, giving CAN P networks the extra space they need without adding unused circuits or termination. It's a straightforward way to extend the