I am going to glass a puck in the hull of my Ranger 619. I purchased the XP 9 20 T, I didn't need the temp because the transducer that comes with the 998 has it. I opened it before I noticed this. I have the AS SIDB Y cable. My question is will the temp be read from the transom mount side imaging transducer or the puck glassed in the hull? I think it will be the one on the transom