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Yes on the trolling motor,no on the shield.

These are three adapters that look identical to me...except the price.

https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=Humminbird+AD+STM+7

I have the XHS 9 HDSI T...

Do you guys think having a helix 9 SI on the trolling motor and SI at the helm is overkill?