Amazon.com: Replacement for 1852068 MKR-US2-8 Hum 7-Pin Transducer Adapter Cable, Compatible with Humminbird Fish Finder and Minn Kota Universal Sonar 2 (US2) Transducer : Electronics
Humminbird 500 series : - Hummingbird Fishfinder Installation and Operations Manual
MS M - Quick Disconnect Mount (100/300/500/700/Matrix Series) - Humminbird