Balzout mount Issue

I own a 2017 Bass Cat Caracal and I'm trying to install the Balzout Mount on the bow.  I removed my existing Elite Ti 7 and want install a new Lowrance HDS 12 Live. Can anyone give me any suggestions on how I can bolt down on the Balzout bracket? The only access to the bow I found was a small opening where the wiring provides power to the trolling motor.  I currently have only four small screws holding the Elite Ti 7 and want better support for the HDS 12. Any suggest would be greatly appreciated.