I bought a Helix 9 mega SI and Helix 7 SI g2n last week. I want to put the Helix 7 at the helm and the Helix 9 mega at the bow. With the transducers mounted on the transom, plus additional DI transducer on the trolling motor hooked to the Helix 9 mega. Is this possible??? If so what all cables would I need? Bass Pro in Memphis is pretty much no help. The guy told me G2N networking meant that you didn’t have to use any cables to connect the Helix g2n units, that they connected by Bluetooth. After a week of messing with these units I figured out he was full of 💩