Railblaza offers one of the easiest ways to set up your fish finder unit and transducer.
Lowrance Hook2 or Elite
Garmin 4 or above
The bundle includes:
1 x Unit mount
1 x Transducer Arm
1 x QuickPort to mount the transducer arm
1 x RibPort to mount the unit allowing you to swap to a rod holder hence the bigger size mount.
Note: The transducer in the last photo should be positioned facing the opposite way.
Simply select what fish finder you have in the drop down menu.