I have recently purchased the Helix 9 with MEGA DI SI CHIRP.I also have the mind kota ulterra with i pilot link. While installing I’ve noticed that i can not have the trolling motor transducer hooked up to the helix at the same time i have the transducer that came with the helix connected (mounted on the stern). Do i need to buy another part or is that just an inconvenience? I bought the $30 dollar cable needed to connect the trolling motor transducer to the helix, it just so happens that it connects to the same port the helix transducer does too. Please help!