Lowrance transducer mounting

[Steveib]

I have a HDS 7 gen 2 with structure scan. It says to mount them with in 1' of each other to use the overlay. I plan on mounting the fish finder transducer on the transoms lower flat spot. Do i mount the structure scan transducer the same hight as the fish finder one or lower? If someone has a pic of how they mounted it would help out alot. thanks for your feed back and time.