MKR-MI-1 Adapter Cable for Helix 8,9,10 & 12 MSI Units 
MEGA Imaging® uses high-frequency sonar so you can easily distinguish fish from structure, see the direction fish are facing and even target individual species. And now with MEGA Imaging+, you'll be able to scan deeper and wider without sacrificing clarity. Adapter connects your Humminbird HELIX 8, 9, 10 or 12 fish finder with a built-in MEGA Side or Down Imaging transducer on your trolling motor. 
Features:
Shielded cable for crystal-clear MEGA Down Imaging sonar performance
Compatible with HELIX
Adapter not required for SOLIX models