Motor mount or jackplate?

I have 07 Etec 115, sorry I am away from my boat right now wont be back near it for a while and need to get some info. It mount that holds the motor to the boat transom. What is the name of that part. I did not have a jackplate add to the boat, so would you consider that the jackplate or motor mount. The reason I am asking I am trying to figure out how to mount my transducer for a SI unit. You can just barely make it out in the picture. Thanks

http://i152.photobucket.com/albums/s.../IMAGE_009.jpg

I have mine mounted lower next to the intake, if your losing bottom lock you better get used to it or order a switch and a thru hull TD use it for running and use the SI for trolling around. As far as where you have it as long as the SI works fine there and the mount dont try to break away I wouldnt bother moving it.