First shot gives a better idea where the transducer is mounted in the bilge of the 06' 197.
Second photo shows the kickpanel with the Medallion MMDC mounted. It is the box on the upper right. Location may vary if you have the subwoofer. My 06' did not.
Third shot shows the bird's nest when you flip the kick panel up for access. The depth module will be floating around on the floor back there somewhere. Black single wire with fancy plug goes back to the transducer. I believe that transducer is sourced from Lowrance. The harness that comes out can then be traced into a bundle that leads to the MMDC.
Last photo shows the harnesses going into the MMDC.
Hope all this helps duplicating factory setup.