If you have a jack plate, you can also mount the transducer on the bottom of a hole shot plate. I did that no my Seaark and it works great up to around 7MPH, then the transducer isn't in the water.
If I were going to redo it, I would probably go with the dual transducers and the cable.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115
Bitter Gun Owner