New boat ordered and have some questions on what I'll need to connect the garmin equipment. I'll have a helix 12 si linked to terrova on the dash. I'll have one 126 on the console and another on the bow. The bow graph will have 54 or 56 transducer on the trolling motor and lvs32 on a pole mount. Garmin through hull 2d with ps30 on the back. Would like to put a cradle on the back of the boat to swap the front 126 back and forth for fishing on the mississippi in current where you are fishing wing dams out the back. Want to be able to move the lvs32 with the 126 to the back. Not sure how long the cord is on that transducer but the boat will be 21.5 feet long. My dealer doesn't sell and isn't well versed in the garmin line up. Thanks for any help you can provide.