If this puck will be used with the console unit I highly recommend mounting the puck on the back of the boat, as close as you can get it to being above the transducer.... but not get interference from the motor. This will provide you the most accurate marking of waypoints and easiest navigating to a marked waypoint. Check location you want to mount it to with a compass. Move the compass around the area... if the needle moves.... try another spot. Duct tape works good to temp mount it and adjust position.
On your unit select to display your readout boxes on the side of your screen. Change 2 of those boxes to "COG" and "Heading". Then drive around and watch those two numbers. Your goal is to adjust the direction of the arrow on the puck so that those two boxes read really close to the same number while moving. Watch the video below...
https://youtu.be/Inr-y8Pe_cM?t=4
** restart the video if is starts in the middle.