I have a Lowrance Hook2-7x 7" Gps Splitshot Fishfinder W/Track Plotter Transom Mount Splitshot Transducer and plan on mounting it on my bow. I have a MK Ulterra TM with built in transducer. I had another Lowrance Hook 7 there but moved it. Can I use the same adapter for the new Hook2-7X7.... OR do I have to mount the new transducer to the TM???