I called the dealer today and they said “Split shot and Triple shot have 2 different head units and are a split shot cannot be used with the triple shot transducer”.
I asked my contact at Lowrance who’s very high up in Customer service/tech support, and according to him, the Hook2 head units are all the same.
He tells me it is plug and play. If you purchase the Tripleshot transducer and plug it in, you’ll have access to the SI, but it will take some clicking around in the menus to get it to work (you have to turn it on basically).
Waxy