I connected Garmin and they told me to go to installer. I am just going mess around with the Portable Transducer Bracket. I did read the manual, best thing its to try different positions myself. Thank you for all your help. Ill trying mounting it after the roller.
I think i found a better solution, https://www.amazon.com/gp/product/B08R7XHT2G/
Now how can tell if its not a good placement on the screen, it shows none sense ?